Brain Stem 1st

Brain stem

spinal cord

CNS

brain stem brain

diencephalon cerebellar telencephalon

I. The brain stem actives conduit functions cranial nerve functions integrative functions

II. The general arrangements of brain stem The nerve tracts The nuclei The cranial nuclei The associated nuclei

The reticular formation

III. The external features medulla oblongata pons midbrain

The medulla oblongata

The pons

The midbrain

The rhomboid fossa

IV. general arrangements of internal structures 1.another subdivisions of the brain stem a. the area post. to the ventricular space ---midbrain tectum b. the area ant. to the ventricular space---tegmentum c. large structures “appended” to the ant. surface of the brain stem---some large fiber bundles

2.cranial nerve nuclei have a generally predictable arrangement According to the functional differences, the cranial nuclei can be divided into 4 categories, and they are distributed in 6 functional columns: (1) The general somatic motor nuclei (2)The special visceral motor nuclei (3) The general visceral motor nuclei

(4)The general and special visceral sensory nucleus (5)The general somatic sensory nuclei (6)The special somatic sensory nuclei