brain stuff Flashcards
basic functions of nervous system?
motor (control of skeletal muscle), sensory (senses), and automatic (reflexes)
higher basic funct of the nervous system?
cognition, emotions, consciousness
afferent
= towards brain
efferent
= away from brain –> to neuromuscular junction
aka lower motor neurons (LMN)
fasciculation
involuntary twitches of skel muscle
hypotonia
decrease in tone (contraction) of skel muscle
hyporeflexia
decrease in muscle stretch reflex
mechanoreceptor
position/vibration/touch = fast
stimuli: mechanical stress, baroreceptors, sound waves, gravity
thick myelin sheath = fast/slow?
fast
temporal lobe
on the sides of temples!!
“tempo” = think auditory
& wernicke’s area (speech interpretation…)
frontal lobe
motor cortex,
prefrontal cortex (complex thinking =executive funct, surprises/direct other areas of brain),
Broca’s area (speech production)
parietal lobe
“piranha” bite you on TOP of your head, you FEEL pain.
somatosensory cortex - receiving sensory signals from skin,
& spatial manipulation
occipital lobe
picture octopus with eyes on its tentacles.
vision
“striated cortex”
which sense does not cross over? (R to L, L to R)
smell!! ipsilateral same side
left hemisphere (= R hand dominate) includes what features?
language
math
how does 2 hemisphere communicate?
corpus collosum
old brain consists of
brain stem
reticular formation
thalamus
cerebellum
reTICULar formation
is part of brains stem, structure runs up
send info from brain stem to other parts of the brain
filter and send info str8 to thalamus
alertness & motivation
cerebellum
“ballerina bella”
must have BALANCE!!
balance voluntary movements
alcohol makes you lose balance bc of it affect this.
brain stem
cross over point for nerves
medulla and pons -> control HR, breathing,
consists of : pon, medulla, reticular formation (pavlov’s really freaking mad)
thalamus
above brain stem
relay station of eyes and ears info
no smell go thru!!
position sense info
= info such as how much muscle is stressed
this info get send into the cerebellum and thru feedback infos, cerebellum adjust muscle movements accordingly
pons
looking at “ponds” are relaxing = pons
regulate waking & relaxing
basal ganglia
major role of motor functions for proper movement, cognition, emotion
deep inside brain, = a group of subcortical nuclei
