BGYB30H3 Lecture 9 Notes CNS 2-Oct 8

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University of Toronto Scarborough
Biological Sciences
Ingrid L.Stefanovic

BGYB30H3 Lecture 9 Notes -the medulla oblongata controls involuntary breathing and vomiting -the pons is the primary relay circuit between cerebellum and cerebrum -the pons controls breathing in conjunction with the medulla -the midbrain controls eye movement(saccades) and relays info to the auditory and visual cortex -the cerebellum processes sensory info such as muscle reflexes and coordinates fine motor control -cerebellum receives inputs from inner ear to control balance and equilibrium of body parts -the diencephalon controls homeostasis and has the thalamus, hypothalamus, pituitary and pineal glands -the thalamus relays motor info from the cerebellum and can modify info as well -the hypothalamus controls homeostasis, temperature, osmolarity, hunger, and sex drive -hypothalamus controls the autonomic nervous system and endocrine function -pituitary and pineal gland release hormones -corpus callosum are axonal tracts between right and left hemisphere -grooves called the central sulcus and lateral sulcus separate the frontal lobe from the other lobes -the nervous system is made up of a sensory, cognitive, and behavioural state system -sensory system monitors internal and external environment leading to reflexes -ZLZ}ŒÇZÇZšK}ZL[šŒoÇ]L}š}šZe cerebrum but only the spinal cord -cognitive system involves cerebral response leading to voluntary responses from the CNS -ZÀ]}µŒoZššZÇZšK]LÀ}oÀZK}š]}LoŒZ‰}LZÁZ] Z}ZL[šoÁÇZ]LÀ}oÀšZ cerebrum (can come from the brain stem) -any response of the body is caused by the integration of the three systems -sensory areas allow increased awareness and perception -association areas integrate info from different sensory regions to initiate voluntary responses -motor areas relay info from association areas to cause a response -function
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