edapt unit 3
Voluntary motor impulses leave the spinal cord via the _________ of gray matter.
Anterior horn
What do neurons in the precentral gyrus do?
They allow conscious control of skilled voluntary muscle movements
What type of nerves is found in the dorsal root?
only afferent nerves
The dorsal root of spinal nerve contains:
only sensory fibers
What is true about the spinothalamic tract?
What is true about the spinothalamic tract?
Which of the following is not considered a voluntary action?
Increasing your heart rate
Which of the following is not a function associated with the spinal cord?
Integrate sensory information at the conscious level
Which of the following is true for preganglionic neurons?
-The axons are myelinated in both divisions of the ANS -They merge with the anterior root of a spinal nerve to form short segments known as white rami communicantes
Where are the paired sympathetic trunk ganglia located?
Paired sympathetic trunk ganglia are located anterior and lateral to the vertebral column.
Which of the following is not considered a region of the spinal cord?
Pelvic
Which cell body of the autonomic motor pathways is located in the Central Nervous System?
Preganglionic
A reflex that causes reciprocal activation of the antagonist muscle is the
crossed extensor
What neurotransmitter is released from adrenergic neurons?
epinephrine
Damage to the posterior root of the third thoracic spinal nerve would result in loss of motor function to the intercostal muscles controlled by that nerve.
false
While playing rugby, Sonny is tackled hard. As he tries to get up, he finds that he has difficulty flexing and adducting his left thigh and extending his left leg. Which nerve innervating the lower limb may be damaged?
femoral nerve
Which of the following is incorrect? 8 cervical spinal nerves 11 thoracic spinal nerves 5 lumbar spinal nerves 5 sacral spinal nerves 1 coccygeal spinal nerve
11 thoracic spinal nerves
What are the ascending tracts and what do they do?
White matter that transmits sensory information to the brain
What are the autonomic motor pathways?
all of the above
An image of the cross-section of a spinal cord would show anterior (or ventral) horns. What is in that region?
cell body of motor neurons
An unlearned and involuntary but predictable motor response to a stimulus that is rapid and does not involve any processing by the brain
spinal reflex
What type of ganglia belongs to the parasympathetic nervous system?
terminal ganglia
The spinal cord is housed within what structure?
the Vertebral canal
Spinal nerves are mixed nerves.
true
You can expect to see flushing of skin above the injury site (face, neck, etc) in a patient with autonomic dysreflexia.
true
Select the true statement regarding nerve connective tissue layers: -Epineurium forms the outer covering of the nerve -Perineurium adheres directly to nerve axons -Endoneurium surrounds bundles of axons known as fascicles -All of the above are true
-Epineurium forms the outer covering of the nerve
Which spinal cord plexus supplies the abdominal wall? brachial plexus cervical plexus sacral plexus More than one of the choices are correct. lumbar plexus
More than one of the choices are correct.
A disease that damages the cells of the anterior gray horn will -Interrupt temperature recognition -Inhibit autonomic regulation -Interrupt proprioception -Cause paralysis or weakness in skeletal muscles
Cause paralysis or weakness in skeletal muscles
The specific patch of skin that is innervated by a specific spinal nerve is called a(n) ________. Gray horn Plexus Dermatome Desmosome
Dermatome
Which of the groups of spinal nerves listed below do NOT form a plexus?
T2-T12
What is linked to the posterior gray horn of the spinal cord?
The dorsal root of the spinal nerve that carries sensory fibers
Which of the following conveys sensory information to the brain and spinal cord?
afferent division of the peripheral ns
