Which of the following statements ACCURATELY describe spinal cord organization. α-motor neurons are organized from lateral to media such that those found towards the medial section of the spinal cord controls the distal muscles. Lumbar spinal cord enlargement is observed where neurons that innervate the legs and feet are located Neuronal cell bodies (somas) of neurons that innervate single muscles are only found in a single spinal cord segment. Muscles of the trunk are represented medially while muscles of arms and hands are represented laterally
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- α-motor neurons are organized from lateral to media such that those found towards the medial section of the spinal cord controls the distal muscles.
- Lumbar spinal cord enlargement is observed where neurons that innervate the legs and feet are located
- Neuronal cell bodies (somas) of neurons that innervate single muscles are only found in a single spinal cord segment.
- Muscles of the trunk are represented medially while muscles of arms and hands are represented laterally
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α-motor neurons are organized from lateral to medial such that those found towards the medial section of the spinal cord control the distal muscles.
- This is inaccurate. α-motor neurons are organized from medial to lateral in the spinal cord, with those medially controlling axial and proximal muscles and those laterally controlling distal muscles.
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Lumbar spinal cord enlargement is observed where neurons that innervate the legs and feet are located.
- This is accurate. The lumbar enlargement contains neurons that innervate the legs and feet.
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Neuronal cell bodies (somas) of neurons that innervate single muscles are only found in a single spinal cord segment.
- This is not entirely accurate. While a major segment of the spinal cord might serve a specific muscle, axons from multiple spinal cord segments might innervate a single muscle.
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Muscles of the trunk are represented medially while muscles of arms and hands are represented laterally.
- This is accurate. The medial part of the spinal cord has neurons that control trunk muscles, while the lateral part has neurons that control limb muscles, particularly the arms and hands.
Considering the above evaluations, the group of answer choices that accurately describe spinal cord organization is: B) 2, 4.
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