Cranial Nerves

Abducens Nerve

Controls the lateral rectus eye muscle

Trochlear Nerve

Move superior oblique eye muscles

Trigeminal Nerve

Works the chewing muscles

cranial nerve VI

abducens nerve, control movement of the muscles of the eyeball and eye lids

cranial nerve VII

facial nerve, provides motor fibers for facial expression and is repsonsible for the snesation of taste at the front of the rongue

what is the function of the cerebellar cortex and where is it located?

located in the gray matter in the cerebellum and responsible for involuntary coordination and control of ongoing body movements

what is the only cranial nerve that involves sensory innervation of the skin and has the greatest general sensory function of the cranial nerves?

trigeminal nerve, cranial nerve V

what two types of nuclei are in the gray matter of the cerebellum?

1. cerebellar cortex 2. cerebellar nuclei

Abducens

Moves the lateral rectus eye muscles

what nerve do dentists anethesizie?

alveolar nerves

cranial nerve XII function

hypoglossal nerve, a pure motor neuron in function. innervates the extrinsic and intrinsic muscles of the tongue, thyrohyoid, and geniohyoid muscles

what is the function of the cerebellar nuclei and where it is located?

located in the gray matter in the cerebellum and responsible of the involuntary coordination and control of on going body movements

what is the function of the middle cerebellar peduncle, and where is it located?

located in the white mater of the cerebellum and is a nerve tract that contains transverse fibers and carries communication between cerebellum and pons

cranial nerve III

oculomotor nerve, control movement of the muscles that move the eyeball and eye lids

cranial nerve I function

olfactory nerve, exclusively a sensory nerve and is involved in the transmission of sensory information form the olfactory epithelium in the nasal cavities (smell) to the CNS

what do the maxillary and mandibular nerves supply?

sensory innervation to the teeth, tongue, and gingiva

cranial nerve XII

hypoglossal nerve, controls movement of the tongue

cranial nerve VIII function

vestibulocochlear nerve, sensory nerve that innervates the inner ear. 1. the vestibular component is responsible for detecting info about the position and movement of the head 2. the cochlear component carries auditory info 3. lesion of vestibular nerve can produce loss of equilibrium 4. lesion of cochlear nerve results in deafness

what six types of nuceli are in the white matter of the cerebellum?

1. arbor vitae 2. cerebellar peduncles 3. superior 4. middle 5. inferior 6. transverse fibers

what are the three parts of cranial nerve V, trigeminal nerve?

1. opthalmic 2. maxillary 3. mandibular

Olfactory Nerve

Carry afferent impulses for sense of smell

Optic Nerve

Carry afferent impulses for vision

Hypoglossal Nerve

Cranial nerve that controls the tongue

Oculomotor Nerves

Extrinsic muscles of eye; all except superior oblique and lateral rectus

Trigeminal Nerve

Senses touch temperature and pain

cranial nerve VI function

abducens nerve, a somatic motor nerve that innervates of one the six muscles responsible for moving the eyeball. the abducens muscle contracts the lateral rectus muscle and causes abduction of the eye

cranial nerve XI function

accessory nerve, motor nerve with two parts; cranial and spinal 1. cranial: joins the vagus nerve and plays a role in swallowing and speaking 2. spinal: innvervates the sternocleidomastoid and trapezius muscles, which turn the head and elevate the shoulders

cranial nerve VII function

facial nerve, contains sensory, motor, and parasympathetic components, a lesion of the facial nerve will lead to paralysis of all the facial muscles on the same side of the lesion. 1. the facial nerve controls all the muscles that control facial expression, a small muscle in the inner ear, and two throat muscles. 2. Provides sensory innervation for taste in the anterior two thirds of the tongue. 3. provides parasympathetic innervation to submandibular and sublinqual salivary glands and to the lacrimal gland

cranial nerve IX function

glossopharyngeal nerve, a somatic motor, sensory, and parasympathetic nerve both somatic and parasympathetic ganglia. 1. responsible for general sensations to the posterior oral cavity and the middle ear, as well as taste to the posterior third of the tongue. 2. contains few motor fibers which help to elevate the pharynx during swallowing 3. transmits sensory info on pressure, pH, and blood gases from receptors in the carotid arteries and the arotic arch

cranial nerve IX

glossopharyngeal nerve, supplies the carotid sinus and taste at the back of the tongue and soft palate, and is responsible for the reflex control of the heart

what does the aveolar nerves do?

innervate teeth, with the superior alveolar nerves derived from the trigeminal nerve maxillary branch, and inferior alveolar nerves derived from the trigeminal nerve mandibular branch

what is the function of the superior cerebellar peduncles and where it is located?

located in the white mater of the cerebellum and is a nerve tract that links the cerebellum with the mesencephalon, diencephalon, and cerebrum

what is the function of the transverse fibers and where are they located?

located in the white matter of the cerebellum (middle cerebellar peduncle) and interconnects pontine nuclei with the cerebellar hemisphere on the opposite side

what is the function of the cerebellar peduncles and where are they located?

located in the white matter of the cerebellum and are nerve tracts that send info from the cerebellum to the midbrain, pons, and medullar

cranial nerve I

olfactory, sense of smell

cranial nerve II function

optic nerve, purely a sensory nerve and is involved in the transmission of sensory information from the retina (vision) to the CNS

cranial nerve II

optic nerve, transmits visual impulses from the retina of the eye to the brain

cranial nerve XI

spinal accessory nerve, responsible for the movement of the muscles of the shoulders, head, neck, larynx, and pharynx

cranial nerve V function

trigeminal nerve, has both sensory and motor components. it is the main sensory nerve to the head, relaying sensation of touch, pain, and temperature. - alpha motor neurons innervate and control muscles required for mastication. THere are 3 main divisions of this nerve; ophthalmic, maxillary, and mandibular.

cranial nerve V

trigeminal nerve, supply sensory fibers to the forehead, skin of cheek, and the muscled used for chewing, there are 3 parts

cranial nerve IV function

trochlear nerve, a somatic motor nerve that innervates one of the six muscles responsible for moving the eye, the superior oblique muscle -the superior oblique muscle rotates the eye inward

cranial nerve IV

trochlear nerve, control movement if the muscles of the eyeball and eye lids

cranial nerve X function

vagus nerve, contains sensory, somatic motor, and parasympathetic fibers, and has both sensory and parasympathetic ganglia. 1. innervates most of the soft palate, pharynx, and larynx muscles 2. regulates swallowing, speaking, taste in the palate region, and sensations from the larynx, respiratory tree, and gastrointestinal tract 3. receives information from chemical and pressure receptors in the carotid bodies and aortic arch, and supplies parasympathetic fibers to the cardiovascular, respiratory, and gastrointestinal system

what cranial nerve mediates most of the important homeostatic reflexes?

vagus nerve, heart rate, blood pressure, and respiration

cranial nerve VIII

vestibulochoclear nerve, carries impulses for the senses of hearing and balance

what is the function of the arbor vitae and where is it located?

located in the white matter of the cerebellum and connects cerebellar cortex and nuclei with cerebellar peduncles

what is the function of the inferior cerebellar peduncle and where is it located?

located in the white matter of the cerebellum and is a nerve tract that links the cerebellum to the medulla oblongata and spinal cord

cranial nerve III function

oculomotor nerve, supplies four of the six extrinsic muscles the move the eyeball and the muscle, levator palpebrae suerious, which raises the superior eyelid. -parasympathetic fibers in the oculomotor nerve innervate eye smooth muscle that regulated pupil size and lens shape

what do the 3 main divisions of the trigeminal nerve do?

ophthalmic, maxillary, and mandibular; supply the face and scalp, cornea, nasal and oral cavities, and cranial dura mater. A lesion of the trigeminal nerve can cause numbness in the face, weakness of the jaw, and loss of the corneal reflex

cranial nerve X

vagus nerve, involved with functions such as swallowing, speaking, secretions from the glands of the stomach, and the sensation of hunger

does the cerebellum have gray and white matter?

yes, with different nuclei and functions