BIOL 527 Lecture Notes - Lecture 11: Cerebral Peduncle, Medial Lemniscus, Medulla Oblongata
3 Aug 2020
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Document Summary
Distance from top of brain to bottom of spinal cord. Grey matter - cerebral cortex (conscious), nuclei of thalamus. Grey matter- nuclei of midbrain, nuclei of pons, nuclei of medulla oblongata. White matter - medial lemniscus, cerebral peduncles, medullary pyramids. Grey matter- dorsal horn (sensory) ventral horn (motor) *skeletal movements voluntary unless it is reflexes. Nuclei (grey matter) and tracts (white matter) that link brain and rest of the body. Grey matter: collection of neuron cell bodies. Ganglion: collection of neural cell bodies (outside of cns) Dendrites axon sensory nerve (communication) 1st neuron 2nd neuron third neuron target (conscious and aware: cerebral cortex) Neural integration: way into processed and passed on. 1% of info conscious (2 pathways) 99% of info subconscious (1 pathway) Ascending: conscious 3 neurons in pathway: target neuron in cerebral cortex (post central gyrus) Dorsal column (medial lemniscus: fasciculus gracilis, fasciculus cuneatus.
