BIO202H5 Lecture Notes - Lecture 8: Central Nervous System, Eustachian Tube, Spinal Cord
Document Summary
Central nervous system (cns): brain and spinal cord. Bio202: lecture 10: special senses: neurons provide connections within cns/ signal transmission from neuron to neuron. Neuron bundles in nerves (group of neurons/axons) provide connections between cns and peripheral nervous system (pns: afferent branches send internal and external stimuli to the cns, efferent branches send signals to pns (can be autonomic or somatic) Autonomic: between cns and internal organs: a synapse in cns and a synapse close to the target organ. Sympathetic is rest and digest (acetylcholine and norepinephrine as neurotransmitters) Somatic nerves from base of brain: cranial nerves. Sensory or autonomic nerves from spinal chord: spinal nerves: towards cns or away to pns, the information is transmitted in different directions. Neuron synapses (a) synapses in no pattern. Central and segmental ganglia (d) (ganglia = bundle of nerves, where information is) Cerebrum: lobes: frontal, temporal, parietal & occipital lobes. Important regions: olfactory bulb, amygdala (emotions), hippocampus (memory)
