Nervous system part two

IX

Glossopharyngeal(mixed)

XII

Hypoglossal(motor)

Parasympathetic impulses to the head, thorax, and upper abdomen are carried via which of the cranial nerves?

III (oculomotor) IX (glossopharyngeal) X (vagus) VII (facial)

Indicate the cranial nerve number for the glossopharyngeal nerve.

IX

Identify the function of the obturator nerve.

Innervates muscles that adduct the thigh.

What are the functions of the radial nerve?

It innervates muscles on the posterior side of the arm. It innervates the skin of the forearms and the hand.

Identify the functions of the femoral nerve.

It innervates the skin of the anterior portion of the thigh. It innervates the muscles of the anterior thigh.

What are the functions of the radial nerve?

It innervates the skin of the forearms and the hand. It innervates muscles on the posterior side of the arm.

How is norepinephrine removed from the synaptic cleft?

It is taken up by the presynaptic neuron.

By what methods might norepinephrine be removed from a synapse, ending its effect on receptors?

It may diffuse into nearby tissue and degraded by enzymes located there. It may be actively transported into the presynaptic neuron that released it.

Choose the statement that best outlines the role of the sympathetic division of the autonomic nervous system. Multiple choice question.

It prepares the body for energy-expending, stressful, or emergency situations.

The anterior branches of spinal nerves ______ contribute to the lumbosacral plexus.

L1-S4

A repetitive-use syndrome, called carpal tunnel syndrome, results from inflammation of the tendons that cross the wrist and can result in compression of which nerve in the area?

Median nerve

-_______________receptors are cholinergic receptors that are found at the synapses of all autonomic ganglia.

Nicotinic

Where are nicotinic receptors found?

On postganglionic neurons in parasympathetic pathways. On postganglionic neurons in sympathetic pathways.

At an organ or effector that is innervated by both the SNS and PSNS, what is the typical type of response to stimulation by these nervous systems?

One would inhibit the organ and one would activate the organ.

Which statement accurately describes postganglionic fibers?

They extend from an autonomic ganglion to a target cell.

V

Trigeminal(mixed)

True or false: At an effector organ, the opposing effects of the sympathetic and parasympathetic nervous systems are due to differences in neurotransmitters used by each system.

True

True or false: Norepinephrine released by adrenergic fibers as well as the adrenal medulla may stimulate sympathetic responses that last for as long as 20 minutes.

True

X

Vagus(mixed)

VIII

Vestibulocochlear(sensory)

When does stimulation at cholinergic receptors end?

When acetylcholine is broken down by enzymes in the synaptic cleft.

Sympathetic preganglionic neurons leave the spinal nerves through the _______ rami.

White

Collateral ganglia are located in the ______, closely associated with certain large blood vessels.

abdominopelvic cavity

The lateral rectus muscles of the eye are controlled by the ______.

abducens nerve

Which nerve innervates muscles that move the eye?

abducens nerve

VI

abducens(motor)

XI

accesory(motor)

Cranial nerve XI is also called the

accessory

What cranial nerve is responsible for innervating muscles in the neck and back (sternocleidomastoid and trapezius)?

accessory nerve

What cranial nerve has both cranial and spinal branches?

accessory nerve (XI)

Both sympathetic and parasympathetic preganglionic fibers release the neurotransmitter

acetylcholine

Muscarinic and nicotinic receptors are receptors for which neurotransmitter?

acetylcholine

Sympathetic and parasympathetic preganglionic fibers both release which neurotransmitter?

acetylcholine

The parasympathetic postganglionic fibers secrete the neurotransmitter _____________________

acetylcholine

What neurotransmitters do cholinergic fibers release?

acetylcholine

Stimulation at cholinergic receptors ends when acetylcholine is broken down by the enzyme

acetylcholinesterase

Norepinephrine and epinephrine are neurotransmitters released from the ______ but the only ______ is released from the sympathetic postganglionic fibers.

adrenal medulla; norepinephrine

In the nervous system, nerve fibers that release the neurotransmitter norepinephrine are called

adrenergic fibers

Most sympathetic postganglionic fibers are classified as ______ because they secrete the neurotransmitter ______.

adrenergic; norepinephrine

Where are the sympathetic chain ganglia located?

along the sides of the vertebral column

The two types of receptors for norepinephrine and epinephrine are ______ and ______.

alpha beta

What is a plexus?

an intermingling of nerves

Which spinal nerves form the cervical plexuses?

anterior branches of the first four cervical nerves

Motor signals leave the spinal cord through the ______ roots. Sensory signals enter the spinal cord through the ______ roots

anterior; posterior

Preganglionic and postganglionic fibers from the motor pathways for the ______ nervous system

autonomic

The _____________ nervous system controls certain muscles without conscious effort to independently maintain homeostasis.

autonomic

The division of the PNS that regulates visceral activities and maintains homeostasis is called the ______ nervous system.

autonomic

What nerve innervates the muscles and the skin of the anterior, lateral, and posterior regions of the arm?

axillary nerve

The two types of receptors for norepinephrine and epinephrine are ______ and ______.

beta alpha

Typically, most organs controlled by the autonomic nervous system receive innervation from which division(s)?

both parasympathetic and sympathetic

Nerves arising from the _________plexus innervate the upper limbs.

brachial

Nerves branching from the ______ plexus innervate the upper limbs.

brachial

The ____________plexus gives rise to several nerves including the axillary, radial, and ulnar nerves.

brachial

The spinal nerves C5-T1 give rise to the ___________plexus

brachial

Thoracic outlet syndrome occurs when there is compression of the nerves of the ________ plexus, usually due to prolonged flexion of the arm or skeletal malformation.

brachial

Thoracic outlet syndrome occurs when there is compression of the nerves of the ___________plexus, usually due to prolonged flexion of the arm or skeletal malformation.

brachial

Damage to the phrenic nerve would affect one's ability to ______. Multiple choice question.

breathe

The smooth muscles of what structures relax in response to stimulation by the sympathetic nervous system. The same muscles contract in response to parasympathetic stimulation.

bronchioles intestines urinary bladder

The smooth muscles of what structures relax in response to stimulation by the sympathetic nervous system. The same muscles contract in response to parasympathetic stimulation.

bronchioles urinary bladder intestines

What is a parasympathetic effect on the respiratory system?

bronchoconstriction

Repetitive hand movements with improper mechanics can inflame the tendons in the wrist. This inflammation can compress the median nerve resulting in pain in the hand and arm. What is the name of this condition?

carpal tunnel syndrome

As the lumbar and sacral nerves extend inferiorly beyond the end of the spinal cord, they form the ______.

cauda equina

What is the name of the descending roots of the lumbar, sacral and coccygeal nerves that extend below the spinal cord but remain in the vertebral canal?

cauda equina

What autonomic fibers extend to the adrenal medulla?

certain sympathetic preganglionic fibers

Nerves of the_________ plexus are compressed in whiplash.

cervical

The __________plexus innervates the muscles and the skin of the neck.

cervical

The phrenic nerves arise from the ______ plexus.

cervical

In the nervous system, nerve fibers that release the neurotransmitter acetylcholine are called ________________ fibers.

cholinergic

The parasympathetic postganglionic fibers (with one exception) are classified as ______ because they secrete the neurotransmitter ______.

cholinergic; acetylcholine

Choose the two distinct parts of the vestibulocochlear nerve (VIII).

cochlear branch vestibular branch

Choose the two distinct parts of the vestibulocochlear nerve (VIII).

cochlear branch and vestibular branch

Impulses for the sense of hearing are carried by the ______ branch of CN VIII, while impulses for the sense of equilibrium are carried by the ______ branch.

cochlear; vestibular

In addition to the paravertebral ganglia, other sympathetic ganglia are found nearer the viscera they innervate. These ganglia are called ______ ganglia.

collateral

Select the effects of parasympathetic stimulation.

constriction of pupil decreased heart rate more blood to digestive organs

Indicate the cranial nerve number for the glossopharyngeal nerve.

cranial nerve IX

Indicate the cranial nerve number for the vagus nerve.

cranial nerve X

Indicate the cranial nerve number for the accessory nerve.

cranial nerve XI

Indicate the cranial nerve number for the hypoglossal nerve.

cranial nerve XII

The anatomical name that reflects the origin of preganglionic parasympathetic fibers in the CNS is the ______ division.

craniosacral

Select the effects of parasympathetic stimulation.

decreased heart rate constriction of pupil more blood to digestive organs

The sympathetic nervous system ______ digestive activities, while the parasympathetic nervous system ______ digestive activities.

decreases; increases

The area of skin served by a particular spinal nerve is called a(n) _______

dermatome

The phrenic nerves, which conduct motor impulses to the __________ arise from the _________ plexus.

diaphragm , cervical

What are the effectors for the motor fibers of the abducens nerve?

extrinsic muscle of the eye

Choose the effectors for the motor fibers of the trochlear nerve.

extrinsic muscle that move the eye

The __________nerve carries sensory signals from the anterior two-thirds of the tongue.

facial

the ____________nerve carries sensory signals from the anterior two-thirds of the tongue.

facial

Which nerve innervates salivary glands and muscles of facial expression?

facial nerve

VII

facial nerve(mixed)

True or false: Most organs are innervated by either the sympathetic nervous system or the parasympathetic nervous system, but not both.

false Most organs are innervated by both the SNS and the PSNS.

Identify the nerve that innervates the anterior portion of the thigh.

femoral nerve

The autonomic nervous system has _________, which are clusters of neuron cell bodies in the peripheral nervous system and are the sites of integration of autonomic signals.

ganglia

Cranial nerve IX is also called the ______ nerve. Type the name of the nerve, not the roman numeral.

glossopharyngeal

The ______ nerve carries sensory impulses from the pharynx, tonsils, and the posterior third of the tongue.

glossopharyngeal

Which nerve carries motor impulses to the pharynx and salivary glands?

glossopharyngeal nerve

Sympathetic postganglionic neurons travel via the ______ rami to leave the sympathetic trunk.

gray

The median nerve innervates muscles of the forearm and skin of the ______.

hand

What functions are regulated by the autonomic nervous system?

heart rate breathing rate blood pressure body temperature

Control centers in the medulla oblongata control what functions of the autonomic nervous system?

heart rate and blood pressure

Cranial nerve XII is also called the

hypoglossal nerve

Which cranial nerve innervates muscles of the tongue controlling tongue movement during speech, chewing, and swallowing?

hypoglossal nerve

The autonomic nervous system is mainly controlled by the ______________located in the brain.

hypothalamus

What area of the brain is responsible for controlling the autonomic nervous system?

hypothalamus

The size of the pupil is ______ by the sympathetic division of the autonomic nervous system and ______ by the parasympathetic division.

increased; decreased

During exercise, the heart rate ______ due to effects of the sympathetic nervous system.

increases

Typically, if the sympathetic division of the autonomic nervous system activates an organ, the parasympathetic division ______.

inhibits it

Identify the functions of the musculocutaneous nerve.

innervates the skin of the forearm innervates anterior arm muscles

What is the function of the ganglia of the autonomic nervous system?

integrate impulses before distributing to effectors

Nerves that innervate the muscles located between the ribs and muscles of the upper abdominal wall are called the

intercostal nerves

The anterior branches of spinal nerves T2-T12 do not enter a plexus. Instead, they continue as _________nerves (T2-T11) or the ___________ nerves (T12).

intercostal, subcostal

The abducens nerves carry motor impulses to one of the pairs of external eye muscles, the _____________ ___________

lateral rectus

the__________system (a part of the brain) and the cerebral cortex control the autonomic pathways to regulate emotional expression and behavior.

limbic

Emotional influence on autonomic function (altered heart rate and respiration rate, for example) involves higher centers in the cerebrum such as the ______, which can affect sympathetic and parasympathetic output.

limbic system

When a physician moves a finger in front of a patient's face, asking them to follow its movement with their eyes, they are testing the function of the ______ nerve.

trochlear nerve IV

.IV

trochlear nerve(motor)

True or false: The gluteal nerve is a nerve of the lumbosacral plexus

true This is a major nerve of the lumbosacral plexus.

How many neurons form a typical autonomic nervous system pathway?

two

What is the name of the nerve that innervates muscles of the forearm and the hand, and the skin of the hand?

ulnar nerve

Parasympathetic fibers that innervate structures in the thoracic and abdominal cavities are carried via cranial nerve __________

vagus

Cranial nerve X is also called the

vagus nerve

What is the only cranial nerve that innervates areas in the chest and the abdomen?

vagus nerve

Which nerve is a mixed nerve?

vagus nerve

Cranial nerve VIII is also called the

vestibulocochlear

A sudden extension of the neck can compress nerves in the cervical plexus, resulting in a persistent headache and a painful, stiff neck. What is the name of this condition?

whiplash

Sympathetic preganglionic neurons leave the spinal nerves through the ________ rami

white

Sympathetic preganglionic neurons travel via the ______ rami to enter the sympathetic ganglia. Multiple choice question.

white

What is a preganglionic neuron?

A neuron that extends from the CNS to an autonomic ganglion.

What is a dermatome?

A region of the skin supplied by a particular spinal nerve.

Choose the statements that accurately describe muscarinic receptors.

All cardiac muscle, smooth muscle and gland cells have muscarinic receptors. ACh binding to muscarinic receptors has an excitatory effect on some cells. ACh binding to muscarinic receptors has an inhibitory effect on some cells.

On this diagram comparing somatic and autonomic motor pathways, which letter indicates a postganglionic fiber?

B organ

What are the spinal nerves that give rise to the brachial plexus?

C5-T1

What are the functions of the oculomotor nerve (CN III)?

Controls muscles that raise the eyelid. Controls muscles of the pupil, to adjust the amount of light entering the eye. Controls muscles that move the eye.

Indicate the location of parasympathetic (terminal) ganglia.

near or in the target internal organs

Adrenergic fibers release the neurotransmitter ______.

norepinephrine

Postganglionic fibers of the sympathetic nervous system secrete a neurotransmitter called

norepinephrine

The adrenal medulla and postganglionic fibers of the sympathetic nervous system both release which neurotransmitter?

norepinephrine

Which neurotransmitter binds to alpha and beta adrenergic receptors?

norepinephrine

Identify the hormones secreted by the adrenal medulla when its cells are stimulated by sympathetic fibers.

norepinephrine epinephrine

Due to the ways that actions of neurotransmitters are terminated, ______ is likely to produce a more prolonged effect than ______.

norepinephrine; acetylcholine

Identify the nerve that innervates the adductor muscles of the thigh.

obturator nerve

Identify the nerve that innervates the adductor muscles of the thigh. Multiple choice question.

obturator nerve

The muscles that move the eyes and eyelids and the muscles that adjust pupil size and lens shape are innervated by the ______ nerve.

oculomotor III

III

oculomotor nerve(motor)(raise eyelid ,move eye , control light entering the eye)

I

olfactory (sensory) sense of smell

Typically, the sympathetic and parasympathetic nervous system innervations at an organ have what type of actions?

opposing actions

II

optic nerve(sensory)(sense of vision)

The ______________ branch of the autonomic nervous system controls the activities of internal organs during times of rest.

parasympathetic

The terminal ganglia are the sites of synapses between the preganglionic and postganglionic neurons of the ______________ division of the autonomic nervous system.

parasympathetic

Secretion by digestive system organs is increased by actions of the __________nervous system and decreased by actions of the ____________nervous system.

parasympathetic , sympathetic

Where do the synapses between the pre- and postganglionic fibers of the sympathetic nervous system occur?

paravertebral ganglia

What structures comprise the sympathetic trunks?

paravertebral ganglia and sympathetic fibers

What are the sources of sensory impulses carried via the vagus nerve?

pharynx, larynx, esophagus, and viscera of the thorax and the abdomen

What are the sources of sensory impulses carried by the glossopharyngeal nerve?

pharynx, tonsils, posterior tongue

A patient is having difficulty breathing. Name a nerve that could be responsible for this difficulty.

phrenic nerve

A complex network of axons of anterior branches of spinal nerves that innervate a particular peripheral body part is called a ______.

plexus

The cervical __________ is formed from the anterior branches of the first ______ cervical nerves.

plexus,four

The preganglionic fibers of the parasympathetic division of the autonomic nervous system arise from neurons located in the _______ _______ __________

pons , midbrain . medulla oblongata

The ______ branch of a spinal nerve innervates the muscles and skin of the back.

posterior

The _________ rami of spinal nerves innervate most of the deep muscles of the back of the trunk responsible for moving the vertebral column and the ___________ rami of spinal nerves innervate the muscle and skin on the limbs and anterior trunk.

posterior, anterior

An autonomic motor pathway consists of a(n) ______ and a(n) ______.

preganglionic fiber postganglionic fiber

Which is a nerve of the lumbosacral plexus?

pudendal nerve

What is the effect of the sympathetic division on the eye?

pupillary dilation

Identify the nerve that supplies muscles of the arm on the posterior side, and the skin of the forearm and the hand.

radial nerve

Identify the nerve that supplies muscles of the arm on the posterior side, and the skin of the forearm and the hand. Multiple choice question.

radial nerve

Which are the sympathetic effects on the urinary system?

reduced urine output by the kidneys contraction of the internal urethral sphincter

Which are parasympathetic effects on the urinary system?

relaxation of the internal urethral sphincter contraction of the urinary bladder wall

What factor explains the differences in effects of the sympathetic and parasympathetic systems on a particular effector organ?

release of different neurotransmitters

What functions of the autonomic nervous system are controlled by centers in the medulla oblongata?

respiration blood pressure heart rate

Except for the first pair, all spinal nerves emerge from the spinal cord as two short branches called ______

roots

Except for the first pair, all spinal nerves emerge from the spinal cord as two short branches called ______.

roots

The fibers of each spinal nerve (except the first pair) connect to the spinal cord via two

roots

The preganglionic parasympathetic fibers from the ______ region of the spinal cord innervate viscera of the pelvic cavity.

sacral

What are the effectors for the motor fibers of the glossopharyngeal nerve?

salivary glands and muscles of the pharynx (used in swallowing)

What are the effectors of the motor fibers of the facial nerve?

salivary glands, tear glands, muscles of facial expression

Irritation of the ____________ nerve results in sciatica.

sciatic

The ______ nerve consists of the common fibular nerve and the tibial nerve.

sciatic

The common fibular nerve and the tibial nerve together form the longest nerve of the body, the _________ nerve.

sciatic

The common fibular nerve and the tibial nerve together form the longest nerve of the body, the

sciatic nerve

What nerves are found in the lumbosacral plexus?

sciatic nerve obturator nerve femoral nerve

Compression of fibers of the sciatic nerve that cause a painful condition called ______.

sciatica

What areas of the body does the cervical plexus innervate?

skin and muscles of the neck

What areas of the body are innervated by the lumbosacral plexus?

skin of the feet muscles in the thigh lower abdominal wall

Indicate the effectors for the autonomic motor fibers of the vagus nerve?

smooth muscle of viscera of thorax and abdomen

The accessory nerve (CN XI) has two branches. What are their names?

spinal branch cranial branch

The ___________________branch of the autonomic nervous system controls the activities of body systems during stressful situations.

sympathetic

The preganglionic fibers of the ___________ division of the autonomic nervous system arise from the thoracic and upper lumbar regions of the spinal cord.

sympathetic

What are the two divisions of the autonomic nervous system?

sympathetic parasympathetic

The autonomic nervous system is divided into the ____________nervous system and the ___________ nervous system.

sympathetic and parasympathetic

The ______ ganglia are located on each side of the spinal cord and are the sites of synapses between preganglionic and postganglionic sympathetic neurons.

sympathetic chain

What type of fibers travels via the gray rami?

sympathetic fibers unmyelinated fibers postganglionic fibers

What is the term for the continuous stimulation of smooth muscles in blood vessels by the autonomic nervous system?

sympathetic tone

Sympathetic fibers and the paravertebral ganglia connected by them comprise the ______.

sympathetic trunk

The ______ division of the autonomic nervous system stimulates the adrenal gland to release two hormones, one being ______.

sympathetic; epinephrine

The ______ nervous system dilates bronchioles to increase airflow, while the ______ nervous system constricts bronchioles to decrease airflow.

sympathetic; parasympathetic

Impulses from what type of receptors are conveyed via the sensory fibers of the facial nerve?

taste receptors on the anterior tongue

Synapses between preganglionic and postganglionic fibers of the parasympathetic nervous system occur in ______ ganglia, which are near or within target organs.

terminal

The cranial branch of each accessory nerve (XI) joins a vagus nerve and correspondingly supplies innervation to ______.

the soft palate, the pharynx, and the larynx

What provides two-way communication between the central nervous system and the muscles and skin of the upper and lower limbs, neck, and trunk.

the spinal nerves

Prolonged flexion of the shoulder can compress nerves of the brachial plexus resulting in pain in the neck, shoulder, or upper limb. What is the name of this condition?

thoracic outlet syndrome

Choose the origins of sympathetic preganglionic neurons.

thoracic region of spinal cord lumbar region of spinal cord

How do spinal nerves exit the vertebral column?

through the intervertebral foramina

The continuous stimulation of smooth muscles of most blood vessels by the sympathetic division is called sympathetic _____________

tone

The ______ nerve branches into the ophthalmic division, maxillary division, and mandibular division.

trigeminal

The somatic and autonomic nervous systems differ in the number of neurons that link the CNS and an effector. More specifically, motor pathways in the somatic system use 2______ neuron(s), while motor pathways in the autonomic system involve ___neuron(s).

1,2

Which statement accurately describes the cauda equina?

A bundle of spinal nerves extending inferiorly from the conus medullaris.

hich statement accurately describes the role of the parasympathetic division of the autonomic nervous system.

Regulates body functions while in restful situations; "resting and digesting" response.

Preganglionic fibers of the parasympathetic nervous system are found in ______ spinal nerves and innervate the organs in the ______.

S2-S4; pelvic cavity

Which statement most accurately describe the synapses between pre- and postganglionic neurons?

Some preganglionic fibers that exit the spinal cord synapse with a postganglionic neuron in a paravertebral ganglion while others pass through a paravertebral ganglion and synapse with a postganglionic neuron within a collateral ganglion.

The autonomic fibers that extend to the adrenal medulla are __________ preganglionic fibers.

Sympathetic

The ______ division of the autonomic nervous system stimulates the adrenal gland to release two hormones, one being ______.

Symphathetic , epinephrine

What spinal nerves do not join a plexus, but rather just continue as intercostal nerves?

T2-T11

Which other cranial nerve joins the vagus nerve?

The cranial branch of the accessory nerve.

Indicate the origins of sympathetic preganglionic neurons.

The thoracic and lumbar regions of the spinal cord.

The anterior branches of spinal nerves L1-S4 are associated with the ______ plexus

lumbosacral

The buttocks, thighs, legs, and feet are innervated by nerves branching from the ___________ plexuses.

lumbosacral

The obturator, femoral and sciatic nerves arise from the ______ plexus.

lumbosacral

What plexus gives rise to a number of nerves that control the muscles of the thighs, legs, and feet?

lumbosacral plexus

Identify the nerve that innervates the muscles of the forearm and skin of the hand.

median nerve

Identify the five major nerves of the brachial plexus.

median nerve radial nerve musculocutaneous nerve axillary nerve ulnar nerve

The vagus nerve originates in the ______ and terminates in the ______

medulla oblongata; neck, chest and abdomen

The vagus nerve originates in the ______ and terminates in the ______.

medulla oblongata; neck, chest and abdomen

The ___________ branches of spinal nerves innervate the blood vessels of the spinal cord, as well as intervertebral ligaments and the vertebrae.

meningeal

The _____________ branches of spinal nerves innervate the blood vessels of the spinal cord, as well as intervertebral ligaments and the vertebrae.

meningeal

Which branch of a spinal nerve innervates the blood vessels of the spinal cord and the vertebrae?

meningeal

The vagus nerve is a ______ nerve.

mixed

The autonomic nervous system contains what type of nerve fibers?

motor fibers efferent fibers

The autonomic nervous system consists of ______.

motor fibers only

What is the function of the intercostal nerves?

motor impulses to muscles between the ribs

What is the function of the spinal branch of the accessory nerves (CN XI)?

motor information to muscles of the neck and back

The first pair of spinal nerves is a purely ____________nerve, while the rest are ____________ nerves, containing both motor and sensory fibers.

motor,mixed

All spinal nerves (except the first one) have two roots. The anterior roots consist of ________ fibers (axons) while posterior roots consist of ________ (axons).

motor,sensory

The autonomic nervous system is a ______ part of the PNS that functions with ______ control.

motor; unconscious

Which type of receptor can either be inhibited or excited by the binding of acetylcholine?

muscarinic

What are the types of cholinergic receptors?

muscarinic receptors nicotinic receptors

What are the effectors for the somatic motor fibers of the vagus nerve?

muscles for speech and swallowing (in tongue, pharynx, larynx)

What is the area innervated by the ulnar nerve?

muscles of the forearm and hand, and skin of the hand

What are the effectors of the motor fibers of the hypoglossal nerve?

muscles that move the tongue

What is the name of the nerve that innervates the anterior arm muscles and the skin of the forearm?

musculocutaneous nerve