CAPS 391 Lecture Notes - Lecture 3: Myelencephalon, Axon, Sympathetic Nervous System
2 Feb 2019
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Brain: forebrain, telencephalon (cerebrum, diencephalon (thalamus, hypothalamus and epithalamus, midbrain, hindbrain, metencephalon (pons and cerebellum, myelencephalon (medulla) Length of the cord has nothing to do with the height (normal is between 43-45cm) Starts at the foramen magnum and ends at li/lii. In supper tall or short people ends at txii or liii (respectively) Inside cns is called nucleus: dorsal(posterior), ventral and lateral(anterior) horns of gray matter, anterior is where you find motor neurons, posterior horn houses sensory neurons. Lateral horn houses autonomic neurons and is only present in certain segments of the spinal cord: sii to siv are parasympathetic, ti to lii are sympathetic. ** a segment is defined as a region giving rise to a pair of spinal nerves. (31 segments) 8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1 coccygeal. 1st order, 2nd order and 3rd order neurons.
