Spinal Cord Anatomy and Function Quiz

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Questions and Answers

Which part of the CNS consists of the brain stem and cerebellum?

Cerebrum (correct)

Brainstem

Spinal cord

Cerebellum

What is the function of the bilaterally paired cerebellar hemispheres?

Voluntary motor control of striated muscle in the face

Coordination of movement (correct)

General sensation from body and back of head

Parasympathetic outflow to visceral organs of pelvis

From where do the cranial nerves arise?

Spinal cord

Cerebellum

Brain & brainstem (correct)

Cerebrum

What is the function of spinal nerves?

Voluntary motor control of striated muscle in the body Signup and view all the answers

What is the main function of the ganglia associated with spinal nerves?

All sympathetic outflow Signup and view all the answers

What does the PNS consist of?

Cranial Nerves, Spinal Nerves & Ganglia Signup and view all the answers

Where is the brain enclosed?

Cranium Signup and view all the answers

What is the elongated continuation of the brainstem enclosed in?

Vertebral column Signup and view all the answers

Which of the following is true about the neurons of the dorsal horn?

They receive sensory information from body wall, limbs, and viscera Signup and view all the answers

What is the function of the ventral roots?

Convey motor information Signup and view all the answers

What is the composition of spinal nerves?

They contain both sensory and motor fibers Signup and view all the answers

What is the function of a somatic nerve plexus?

Create compound nerves carrying axons from 2 or more spinal segments Signup and view all the answers

What is the role of visceral nerve plexuses?

Control the balance between sympathetic and parasympathetic inputs Signup and view all the answers

What is the definition of a reflex?

An involuntary motor response evoked by a specific stimulus Signup and view all the answers

What is the primary function of the neurons in the ventral horn?

Somatic motor control Signup and view all the answers

What is the consequence of a lesion of a dorsal root?

Sensory signs seen in a dermatomal distribution Signup and view all the answers

What is the outcome of a lesion of a ventral root?

Motor signs in a myotomal distribution Signup and view all the answers

What is the significance of spinal nerves being mixed nerves?

Both sensory and motor signs may be seen in a lesion of a spinal nerve Signup and view all the answers

What is the role of a nerve plexus in muscle innervation?

Control muscles innervated by compound nerves from multiple spinal segments Signup and view all the answers

What is the location for cerebrospinal fluid (CSF) sampling?

Lumbar cistern Signup and view all the answers

Where is the site for epidural anesthesia injection?

Epidural space Signup and view all the answers

What is the mass of nerves below vertebral level L2 called?

Cauda equina Signup and view all the answers

Which part of the spinal cord carries sensory information upward and motor information downward?

Spinal white matter Signup and view all the answers

What is the location of the intermediolateral cell column?

Spinal grey matter Signup and view all the answers

Where is the spinal cord enclosed in meninges?

Dura mater, arachnoid mater, and pia mater Signup and view all the answers

What is the function of dorsal roots?

Carry sensory information Signup and view all the answers

What is the function of the spinal grey matter?

Primarily sensory Signup and view all the answers

Which part of the spinal cord shows enlargement at cervical and lumbar levels?

Ventral horns Signup and view all the answers

What is the extension of the dural sac to vertebral level S2 called?

Cauda equina Signup and view all the answers

What is the location of the regional variations in the spinal cord?

Dorsal and ventral horns Signup and view all the answers

Where does the spinal cord end?

Conus medullaris at vertebral level L2 Signup and view all the answers

Study Notes

Spinal Cord Anatomy and Function

The spinal cord is associated with both cranial and spinal nerves, with dermatomes and myotomes at specific levels.
It is enclosed in meninges, consisting of the dura mater, arachnoid mater, and pia mater, with the subarachnoid space containing cerebrospinal fluid (CSF).
Spinal nerves are named according to their associated vertebrae, with bilateral paired spinal nerves emerging from specific segments.
The cauda equina, a mass of nerves below vertebral level L2, extends from the conus medullaris and is enclosed in the dural sac, which extends to vertebral level S2.
The lumbar cistern, containing CSF, lies between the arachnoid and pia maters and extends to the coccyx.
The spinal cord ends as the conus medullaris at vertebral level L2, and the nerves below this level form the cauda equina.
The epidural space, filled with fat and blood vessels, is the site of epidural anesthesia injection.
Cerebrospinal fluid (CSF) is sampled in a lumbar puncture, with the lumbar cistern being the location for CSF sampling.
The spinal white matter carries sensory information upward and motor information downward, with sulci delineating it into columns.
The spinal grey matter forms a continuous column, divided into dorsal and ventral horns, with the intermediolateral cell column present at certain levels.
Regional variations in the spinal cord include enlargement of ventral horns at cervical and lumbar levels, containing somatic motor neurons innervating the arms and legs, and the presence of IML cell columns and lateral horns.
Dorsal roots carry sensory information, with neurons of the dorsal horn being primarily sensory.

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Description

Test your knowledge of spinal cord anatomy and function with this quiz. Explore the structure, function, and associated nerves of the spinal cord, including details about the meninges, spinal nerves, cauda equina, and cerebrospinal fluid.