ACB 334 Study Guide - Comprehensive Final Exam Guide - Brainstem, Thalamus, Cerebral Cortex

• School: U of S
• Department: Anatomy and Cell Biology
• Course: ACB 334
• Professor: Jen Chlan

Document Summary

Divisions of the ns: pns: cranial nerves, spinal nerves, autonomic ns, enteric ns, cns: brain and spinal cord. Sagittal plane = medial midsagittal; lateral parasagittal. * coronal section has different planes for the cerebral cortex and the brainstem (fig 2. 18) Primarily composed of neurons (grey matter) = signaling cells; outside in brain, inside in sc. Glia (white matter) = support cells; inside in brain, outside in sc: pyramidal (excitatory) neurons = (cid:373)ostly (cid:862)lo(cid:374)g ra(cid:374)ge(cid:863) co(cid:374)(cid:374)ectio(cid:374)s often myelinated, granular (inhibitory) neurons = (cid:862)short ra(cid:374)ge(cid:863)/local not usually myelinated. L2: development of the brain and spinal cord. Neural plate is evident at 4. 5-5 days post-conception. 3 main germ layers evident at 15 embryonic days. Neural plate is just starting to fold forms neural groove. Pressure from growth of underlying mesoderm (pushes up on ectoderm) Future neural crest cells at neural folds. Neural groove closes beginning of neural tube, neural crest cells pinch off, and surface ectoderm joins together.