Human biology- nervous system
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Human biology- nervous system - Leaderboard
Human biology- nervous system - Details
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| 🇬🇧 | 🇬🇧 |
| Central nervous system components | Brain spinal cord contains relay neurons(interneurons) |
| Peripheral nervous system components | 12 pairs of cranial nerves. (arise from brain ie optic, audio) 31 pairs of peripheral nerves (arise from spine) contains: sensory neurons motor neurons |
| Devisions of the PNS | Afferent(away from CNS) -somatic from organs -viceral from skin and organs Efferent (towards) -somatic- skeletal muscles -Autonomic-heart, involuntary muscles, glands i. sympathetic-fight flight i.i. parasympathetic -normal function |
| Cerebrum | Biggest section outer surface= grey matter inner = white matter- militated fibres additional grey matter central- basal ganglia mental functions such as thinking, reasoning, learning, memory perception, senses, control of VOLENTARY MUSCLE CONTRACTIONS |
| Thalamus | Grey matter structure near brain centre, above mid brain just above hypothalamus |
| Lobes of cerebrum | Frontal -cognitive function, voluntary movement parietal lobes, info about taste, temp, touch, movement occipital -vision tempural -memory and senses |
| Corpus callosum | Wide band of nerved under cerebrum, crossing hemispheres, allows brain communication |
| Cerrebellum | Lies under rear cerebrum posture, balance, fine coordination, voluntary muscles receives sensory info from ear, posture balance and stretch receptors-muscles |
| Hypothalamus | Middle brain bellow pituitary homeostasis |
| Medulla oblongata | Continuation of spine vital control center cardiac, respiratory, vasomotor, reflexes, swallowing, coughing regulated by hypothalamus |
| Cerebral cortex | Outer layer of cerebrum-consists of the 4 lobes |