ACB 8120 Lecture Notes - Lecture 59: Cranial Nerve Nucleus, Sulcus Limitans, Alar Plate

• School: University of Iowa
• Department: Anatomy and Cell Biology
• Course: ACB 8120
• Professor: Hoffman

Document Summary

Maintains the basal plate (motor) and alar plate (sensory) Higher brain centers eventually regress the bp and accumulate only alar plate. Ap = lateral, bp = medial (widening of sulcus limitans) Cn i and ii originate from prosencephalon. Cn iii and iv originate from mesencephalon. Cn v-xii originate from the rhombencephalon (hindbrain) Motor cns are derived from embryonic neuroepithelial neuroblasts similar to ventral roots of spinal nerves. Cn sensory ganglia are derived from nccs like the drg and dorsal roots. Cns with sensory will be more lateral. Cn with motor will be more medial. Some can be only sensory (lateral in ap) or motor (medial in bp) Lateral ap = groups of sensory relay nuclei. Medial bp = groups of motor nuclei. ** nuclei correspond to the specific modalities of the cns. Midbrain (mesencephalon), pons (met - rhom), medulla (myel - rhom) Midbrain = pillarys where you can see the boobs of the mammillary region of the thalamus between.