human neurophysiology Flashcards
(36 cards)
PNS
sensory, motor systems
cns
Brain, spinal cord
sensory system
afferent (to brain) from muscles+ organs
motor system
efferent (away from brain) to muscles & organs
enteric nervous system
largest endocrine & immune organ. separate from cns, respond to ANS
Gut microbiota
90%. of total cell count, digest nutrients & release NT / hormones
Dopamine
motor control, habits, motivation
norepinephrine
stress, memory, attention
serotonin
90% in the gut (regulates intestinal movements)10% CNS ( regulates mood & sleep)
neuronal density
no. of neurons reflect body size
automatic nervous system
regulates function of internal organs & involuntary changes
sympathetic NS
prepares you
parasympathetic NS
calms down
predictions of intelligence
encephalisation quotient , neuronal density, frontal lobe uniqueness
Triune brain hypothesis
assumes intelligence is the same in all species & newer replaces old structures
prefrontal cortex controls
higher cognition. decision making
grey matter in human PFC
1.2 x higher than chimps
neurons percentage
50%, signals through electrical & chemical
Glia
50%,
microglia
phagocytosis, rubbish clearing
astrocytes
energy to nervous tissue
oligodendrocyte
act as axons
neural communication
receives info. from dendrites+ communicate down axon to synapse
grey matter
high concentration of neurons
