Problem:
Please read all the questions carefully and answer them.
Question 1: Identify the path through which sympathetic motor output reaches vascular smooth muscle (throughout the body):
(a) spinal nerve pairs,
(b) paravertebral ganglia, or
(c) spinal nerves via the paravertebral ganglion chains.
Question 2: Use this drawing (see Figure 54) of a spinal nerve pair from the thoracolumbar cord to answer the next series of questions. First, where are ?-motor neuron cell bodies found?
(a) orange highlight,
(b) yellow highlight, or
(c) non-highlighted gray matter.
Question 3: Where are motor neuron cell bodies found?
(a) orange highlight,
(b) yellow highlight, or
(c) non-highlighted gray matter.
Question 4: Would the orange-highlighted nuclei be found upwards into the cervical cord and downwards into the pelvic cord?
(a) yes, or
(b) no.
Question 5: Motor neurons throughout the cord receive negative feedback from Golgi tendon organs via glycinergic neurons. Where are such neurons in the drawing above?
(a) orange highlight,
(b) yellow highlight, or
(c) non-highlighted gray matter.
Question 6: Recall that the spinal nerve pair in the drawing above is associated with the thoracolumbar cord. Are Clarke's columns (or nuclei) found within the thoracolumbar cord?
(a) yes, or
(b) no.
Question 7: Do the posterior spinocerebellar fiber tracts project through the white matter of the thoracolumbar cord?
(a) yes, or
(b) no.
Question 8: The bundled axons that form the left and right posterior spinocerebellar tracts project from:
(a) sensory neurons in dorsal root ganglia attached to the pelvic cord, or
(b) interneurons within the pelvic cord.
Question 9: The intermediolateral nuclei appear as cross-sections in the drawing above. Use these two cross-sections to envision two columnar nuclei. Where would you find each entire nucleus in body space?
(a) along the length of the entire cord,
(b) only within the thoracolumbar cord, or
(c) only within the medial portion of the thoracolumbar cord.
Question 10: What type of autonomic motor neuron is found within the intermediolateral nuclei?
(a) premotor,
(b) preganglionic, or
(c) postganglionic.