Anatomy of the Spinal Cord and Spinal Nerves
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Anatomy of the Spinal Cord and Spinal Nerves

Test your knowledge on the internal arrangement of gray and white matter in the spinal cord, as well as the structure and function of spinal nerves. Topics include gray and white matter distribution, spinal nerve composition, and dorsal root ganglion.

Created by
@FortunateKazoo

Questions and Answers

What is the function of the dorsal root ganglion?

It contains the nerve cell bodies of sensory neurons coming from the body

How many spinal nerves are in the thoracic region?

12

What is the mnemonic for the branches of the posterior cord of the brachial plexus?

ULTRA - Upper subscapular, Lower subscapular, Thoracodorsal, Radial, Axillary

Which plexus is formed by the spinal nerves C5 through T1?

<p>Brachial plexus</p> Signup and view all the answers

What is the function of the ventral root?

<p>It carries motor information from the anterior gray horn and innervates muscles</p> Signup and view all the answers

Which spinal nerves form the cervical plexus?

<p>First 5 cervical nerves</p> Signup and view all the answers

What is the function of the brainstem?

<p>Permitting voluntary movements smoothly</p> Signup and view all the answers

Which structure connects the narrow spinal cord with the forebrain?

<p>Medulla oblongata</p> Signup and view all the answers

Which nerve emerges between the pyramid and the olive, crosses the posterior cranial fossa, and leaves the skull through a specific canal?

<p>Hypoglossal nerve</p> Signup and view all the answers

Which nerve is involved in the sense of smell?

<p>Olfactory nerve</p> Signup and view all the answers

Which nerve is known as the 'motor nerve'?

<p>Hypoglossal nerve</p> Signup and view all the answers

Which structure is not part of the meninges covering of the brain?

<p>Gray matter</p> Signup and view all the answers

What is the primary function of dermatomes?

<p>To assess spinal cord damage by mapping skin sensation</p> Signup and view all the answers

Which muscle is innervated by the common fibular nerve?

<p>Biceps femoris (short head)</p> Signup and view all the answers

Which of the following is NOT a function of the parasympathetic division of the autonomic nervous system?

<p>Pupil dilation</p> Signup and view all the answers

Which division of the autonomic nervous system controls the resting state of the body?

<p>Parasympathetic division</p> Signup and view all the answers

Which part of the central nervous system do the sacral segments of the parasympathetic division originate from?

<p>Sacral spinal cord</p> Signup and view all the answers

Which of the following structures is NOT innervated by the cranial segments of the parasympathetic division?

<p>Skeletal muscles</p> Signup and view all the answers

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