Medulla

Question 1

pyramids

Answer 1

• two long, finger-like structures that lie along the midline of the ventral surface of the caudal brainstem.
• -formed by descending axons of corticospinal motor neuron.
• crossing fibers visible at the caudal end of the pyramids. [corticospinal motor axons cross over to the contralateral side of the spinal cord]

Question 2

What produces CSF?

Answer 2

choroid plexus

Question 3

nucleus cuneatus and nucleus gracilus do what?

Answer 3

receive touch-pressure somatosensory information from the spinal cord

Question 4

The axons from the cuneatus and gracilus nucleus form ____.

Answer 4

the medial lemniscus

Question 5

decussates

Answer 5

) cross or intersect each other to form an X.

Question 6

importance of the Foramena of Luschka and the Foramen of Magendie

Answer 6

These foramena are the points of exit for CSF (produced by choroid plexus within the ventricular system of the brain) to the subarachnoid space.

Question 7

Foramena of Luschka vs the Foramen of Magendie

Answer 7

Foramena of Luschka are the lateral openings of the ventricular system.

Foramen of Magendie is located at the mid-saggital juncture of the cerebellum and the medulla. There is a small opening into the 4th ventricle.

(Luschka is Lateral; Magendie is Medial)