The document outlines 16 topics related to brain stem anatomy including the reticular formation, spinal cord and brainstem cell columns, ascending and descending pathways, fiber tracts like the medial longitudinal fasciculus, and decussations. It also requests illustrations and explanations of 10 cross sections of the spinal cord and brainstem at different levels to depict the structures in each region.

1. (Brain stem anatomy (Questions part II
I- Account briefly on:
1- Reticular formation (definition, location, connections and functions)
2- Cell columns of the spinal cord and brainstem (mention name, location and
distribution for each one)
3- General somatic efferent column in the brain stem
4- General visceral efferent column in the brain stem
5- General somatic afferent column in the brain stem
6- Special visceral (branchial) efferent column in the brain stem
7- Special visceral afferent column in the brain stem
8- Special sense afferent column in the brain stem
9- Motor decussations of the brainstem
10- Sensory decussations of the brain stem
11- Main fiber composition of the medial longitudinal fasciculus (MLF) and its
function
12- Main ascending pathways in the brain stem
13- Main descending pathways in the brain stem
14- Lemnisci
15- posterior column-medial lemniscus
16- Arcuate fibers
II- Illustrate the structure of the following (explain and use a
diagram):
1- Cross section at C1 segment of the spinal cord
2- Cross section at the spinomedullary junction
3- Cross section at the closed medulla (at the level of motor decussation)
4- Cross section at the closed medulla (at the level of sensory decussation)
5- Cross section at the level of upper (open) medulla
6- Cross section at the pontomedullary junction
7- Cross section at the midpons
8- Cross section at the upper pons
9- Cross section at the lower midbrain
10-Cross section at the upper midbrain