7A - Behavior Flashcards
the forebrain develops into
cerebrum
the midbrain develops into
midbrain
the hindbrain develops into
pons/medulla/cerebellum
basic neural fxn includes
motor, sensory, automatic(reflexes)
higher level neural fxn includes
cognition, consciousness, emotion
what is a lower motor neuron(LMN?)
efferent PNS neuron that synapses on motor unit for skeletal muscle contraction to form a neuromuscular junction
what is atrophy?
loss of muscle volume
what is a fasciculation?
involuntary “twitch” of muscle
what is hypotonia?
decrease in “tone” of muscle (baseline level of contraction)
what is hyporeflexia?
decreased reflexive response to stimulation
what are the components of the muscle stretch reflex?
afferent (stimulus), efferent (response).muscle stretch fiber responds and instructs muscle to contract
neurons in the autonomic nervous systm control?
smooth muscle, cardiac muscle, gland cells
what is grey matter?
mostly neural soma
what is white matter?
mostly myelinated axons
where is grey matter located in the spinal cord?
inside. white is on outside
where is grey matter located in the brain?
on the outside, white is on inside
what do upper motor neurons do?
control lower motor neurons
where are upper motor neurons located?
the cerebral cortex, synapse in spinal cord
what is the corticospinal tract?
when UMN from cerebral cortex synapses in sinal cord
what is the corticobulbar tract?
when UMN from cerebral cortex synapses in brainstem
what are the upper motor neuron signs?
hyperreflexia, clonus (rhythmic contractions of muscles), hypertonia, positive babinski sign
somatosensory tracts synapse on the (same side/opposite side) in the brain
opposite side
what are the function of the bumps/grooves in the cerebral cortex?(gyri/sulci)
increase surface area
what is the function of the frontal lobe?
contains prefrontal cortex, motor cortex, Broca’s area