CN Nuclei

Question 1

Organizing principles for cranial nerve nuclei in the brainstem (4)

Answer 1

Sensory nuclei are lateral to motor nuclei
Visceral afferents are medial to somatic afferents
Visceral efferents are lateral to somatic efferents
Special efferents are ventral to general efferents

Question 2

Organizing principles in the spinal cord (4)

Answer 2

Sensory nuclei/fibers are posterior; motor nuclei/ fibers are anterior
Fibers that convey pain and temperature enter the cord laterally and are unmyelinated
Fibers that convey touch enter the cord medially and are heavily myelinated
Neurons that control axial muscles are medial to those that control distal muscles