PSYC 301 Lecture Notes - Lecture 3: Corticospinal Tract, Auditory Cortex, Lumbar Puncture
3 Feb 2016
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Document Summary
The spinal cord: the brain"s extension into body. Damage = impairments to touch and movement. Brain fluid shared with spinal cord: certain areas of brain can be discovered by looking at the fluid. If brain has hemorrhage, can look for if blood present in spinal cord fluid. Cauda equina: lower portion of spinal cord: can inject needle to test fluid (lumbar puncture) here because low chance of damaging. Dermatomes: diff areas of spinal cord that correspond to diff areas of. Damage higher up, more function lost: motor function, sensory function for entire body. Paraplegia: inability to function from waist down. Primary tract for voluntary movement: corticospinal tract. Tectospinal: also contributes to voluntary movement, kicks in if corticospinal tract dysfunction, head and eye movements. Lateral spinothalamic tract: processing pain and temperature. Medial lemniscal tract: touch and proprioceptive info, proprioceptors: tell whether muscles are contracted or extended, proprioception: sense of where body is in space (cid:1) (cid:1) (cid:1) (cid:1)
