PSY1003 WEEK 1 LO: be familiar with 5 major subdivisions of brain Flashcards
(28 cards)
what is blood brain barrier role
doesn’t stop passing of all large molecules, allow glucose through via AT. allows ‘immunologically privileged site’
name 3 main subdivisions of brain
forebrain, midbrain, hindbrain
what are 5 main subdivisions of brain
telencephalon and diencephalon (forebrain), mesencephalon (midbrain), metencephalon and myelencephalon (hindbrain)
briefly state what cerebellum is
little brain
what can brain stem damage cause
coma
what is telencephalon
most of 2 cerebral hemispheres, mediating complex function like voluntary movement. contain limbic system, basal ganglia, cerebral cortex
describe what cerebral cortex looks like
grey matter, convoluted, large furrows (fissures), small fissures (sulci), gyri (ridge between fissures and sulci)
what does visual association damage cause
visual agnosia - cannot connect visual to description, function or knowledge. eg: see cat, cannot name
where is the primary auditory cortex located
temporal lobe
where is primary somatosensory cortex located
parietal lobe
where is primary motor cortex located
frontal lobe
what 2 sub-structures does the diencephalon contain
thalamus and hypothalamus
what is thalamus
the “inner chamber”, divided into nuclei including sensory relay nuclei which transmit info from receptor to cortex
what is hypothalamus
autonomic and glandular part of response in 4F’s (fighting, mating, flee, feed)
what is function of suprachiasmatic nucleus and give evidence for it
circadian rhythms (24hr), empirical evidence from manipulating SCN in rats to change sleep cycles
what 2 sub-structures does mesencephalon contain
tectum and tegmentum
what is tectum
top of midbrain, inferior (auditory) and superior colliculi (visual, produce saccades in REM)
what 3 structures does tegmentum contain
periaqueductal grey, red nucleus, substantia nigra
what is role of periaqueductal grey
species-specific behaviour like lordosis during copulation
what is role of red nucleus
motor system, bilateral coordination like arm swinging
what is role of substantia nigra
motor system, damage can result in Parkinson’s
what does the myelencephalon do
contain medulla oblongata- contain nuclei to control respiration, respiratory rhythm, RAS, arousal, tongue musculature, BP, HR
what controls BP/HR
nucleus ambiguus and the vagus nerve
what 2 sub-structures does the metencephalon contain
pons and cerebellum
