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L18 Anatomy and Function of the Spinal Cord and Spinal Nerves

Description

• The external and internal anatomy of the spinal cord+associated structures • How neural information is organised within the spinal cord+direction of information flow • How neural information enters and exits the spinal cord • The spinal nerves and how neural information travels in them out into the body • The structure of a peripheral nerve
Mer Scott
Quiz by Mer Scott, updated more than 1 year ago
Mer Scott
Created by Mer Scott about 7 years ago
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Resource summary

Question 1

Question
Which neurons have their cell bodies within the CNS?
Answer
  • The somatic efferent neuron and the first neuron of the sympathetic division of the autonomic nervous system.
  • The somatic afferent neuron and the first neuron of the parasympathetic division of the autonomic nervous system.
  • The somatic efferent neuron and the second neuron of the sympathetic division of the autonomic nervous system.
  • The somatic efferent neuron and the second neuron of the parasympathetic division of the autonomic nervous system.

Question 2

Question
Which statements about the external anatomy of the spinal cord are true?
Answer
  • It ends at the superior border of the second lumbar vertebrae. (L2).
  • It leaves the skull though the foramen magnum.
  • It is within the meningeal sack, which sits inside the spinal cavity.
  • The spinal cavity surrounds the vertebrae.

Question 3

Question
The CSF (cerebrospinal fluid) is to provide cushioning as well as nutrients.
Answer
  • True
  • False

Question 4

Question
From the deepest part to the most superior part, the spinal cord is protected by CSF > Adipose Tissue > Meninges > Vertebrae
Answer
  • True
  • False

Question 5

Question
Which statement about the external anatomy of the associated features of the spinal cord is false?
Answer
  • The conus medularis and filum terminale are connective tissue.
  • The filum terminale is an extension of the nerves.
  • The conus medularis is a tapered cone at the distal end of the spinal cord/meningeal sack.

Question 6

Question
Spinal nerves are named after the vertebrae/spinal cord region they exit/enter. The spinal cord, from superior region to most inferior region, goes Cervical > Thoracic > Lumbar > Sacrum.
Answer
  • True
  • False

Question 7

Question
Inferior to the end of the spinal cord, some lumbar and all sacral nerves continue to exit the vertebral column.
Answer
  • True
  • False

Question 8

Question
Which statement about the cauda equina is false.
Answer
  • It is the region of the meningeal sack inferior to the spinal cord.
  • At its most inferior point, spinal nerves exit the cauda equina at the coccygeal level.
  • The existence of the cauda equina means that you can only damage your spinal nerves if the spinal cord is damaged.

Question 9

Question
The central canal is more of a theoretical or potential space than a real space.
Answer
  • True
  • False

Question 10

Question
White matter is cell bodies.
Answer
  • True
  • False

Question 11

Question
Which of these statements about the internal anatomy of the spinal cord is correct?
Answer
  • Neurons leaving the ventral root always synapse with skeletal muscle.
  • The dorsal root ganglion carries afferent information to the brain.
  • The anterior region of the spinal cord carries ascending information.
  • Damage to the posterior region of the spine affects motor control.

Question 12

Question
The dorsal root ganglia and the sympathetic chain ganglia are the same thing.
Answer
  • True
  • False

Question 13

Question
The dorsal root ganglion contain cell bodies of neurons which are unipolar.
Answer
  • True
  • False

Question 14

Question
A spinal nerve contains both afferent and efferent information.
Answer
  • True
  • False

Question 15

Question
The ventral ramus is one of two diverging paths from a spinal nerve, which brings both afferent and efferent information to the posterior of the body.
Answer
  • True
  • False

Question 16

Question
The sympathetic chain ganglia diverge from the dorsal ramus.
Answer
  • True
  • False

Question 17

Question
A bundle of axons in the PNS is called a tract.
Answer
  • True
  • False

Question 18

Question
A nerve is fascicles surrounded by perineurium containing axons surrounded by endoneurium, bundled together with blood vessels and surrounded by epineurium.
Answer
  • True
  • False
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