Midterm 1 - Reflex Arcs Flashcards
what is the higher centers of control
cerebral cortex
what is the middle level of control
sensorimotor cortex
cerebellum
basal ganglia
what does the basal ganglia control for movement
semi-voluntary movement
what does the cerebellum monitor for movement
execution
what is the lower level of control
spinal cord from which motor neurons exit
what is the site of somatic reflex arcs
lower level/spinal cord
what sends back sensory info to CNS
tensions in muscles and tendons and angles of joints
what is a reflex
an automatic or unconscious response of effector organs to a stimulus
what are reflexes always
involuntary and unvarying (always the same)
what are the 5 fundamental components that a reflex contains
sensory cells/receptors
sensory nerve fibers
coordinating center (CNS)
motor nerve fibers
effectors (muscle or gland cells)
does a reflex need all 5 components
yes
what happens if there is a problem with any one of the 5 components
the reflex won’t work - alteration in response
what are changes in muscle length detected by
muscle spindles
what do modified muscle fibers make
spindle or intrafusal fibers
what detects changes in tendon length
golgi organ
