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18 Cards in this Set

  • Front
  • Back
*structure on top of brain stem
*controls coordinated movements and learned movements
*maintains balance positions and controls eye movements
*connected to motor cortex(frontal lobe)
*cerebellum receives motor plan, and affected input of current muscle position
*happens during movement - "aim"
*practice reduces need for a cortical motor plan-> cerebellum takes over
-Input to cortex
*cerebellum-> info to cortex on currect activity
*cortex plan future movement
Brain Stem
*medulla, pons, midbrain
*interface between spinal cord and highe brain centers
*cranial nerve input, output-> sensory and motor to head and neck
Reticular Activating Systems (RAM)
*neural net, awareness of surroundings, no focus
*receives cortical, pain, auditory, visual input
*controls consciousness/sleep
*reason needed is unknown
*low frequency activity in hypothalamus and thalamus
EEG patterns
*change while sleeping
*slow wave sleep-EEG waves get slower and longer
*REM sleep(paradoxical sleep)-EEG is similar to being awake
Slow Wave Sleep
*4 stages, each progressively deeper
*conscious thought, no true dreams
*75 min/cycle
*circadium rhythm-> causes increase adenasine in brain-> triggers sleep
*muramyl dipeptite-sleep factor
Rapid Eye Movement(paradoxical) sleep. [REM]
*REM sleep-most likely to awaken
*hardest stage to be awakened by someone else
*high activity in visual cortex, low in frontal, high in memory areas
*dreams are illogical/make new long term memory synapses
Spinal Cord
*neural tissue
*encased in vertebral column
*carries AP's
Spinal Cord
*bundles of axons-carry AP's
*ascending tracts-afferents to brain
*descending tracts-efferents from brain to spinal cord or efferon neurons
Spinal Cord
-Dorsal Roots
*entry point for afferent neurons
*afferent neuron cell bodies are in dorsal root ganglia
Spinal Cord
-Ventral Roots
*carry out APs out of spinal cord
*cell bodies for efferent n's are in gray matter of spinal cord
*neural reponses without a conscious effort
-Reflex Arc
*5 components
*receptor-trigger activity in afferent neurons-CNS-trigger efferont neurons-effector(muscle or gland)
*CNS - 1 or more synapses
-Withdrawal Reflex
*strongest reflexes-polysynaptic
*CNS influences-multiple reinforcement
*used to remove discomfort or pain, or anticipation of either
-Stretch Reflex
*monosynaptic- your afferent neuron synapses with efferent neurons
*knee jerk-no CNS imput--used to judge spinal cord health