Alualu ʻauwa

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• Hōʻike Overview

Hōʻike Overview

Hana ʻia ka ʻōnaehana makaʻu i ʻelua ʻāpana. Loaʻa i kēlā me kēia ʻāpana nā piliona o nā neurons. ʻO ka ʻāpana mua ka ʻōnaehana haʻalulu waena. Aia i loko o ka lolo a me ka iwi kuamoʻo, kahi fibrous, ʻano ropelike e holo ma waena o ka iwi kuamoʻo i waenakonu o ke kua.

ʻO ka ʻāpana ʻē aʻe ka ʻōnaehana ʻōnaehana ākea. Loaʻa iā ia he mau kaukani nā aʻa e hoʻohui i ka iwi kuamoʻo i nā mākala a me nā mea loaʻa loaʻa. ʻO ke ʻōnaehana nūhou pilikino ke kuleana no reflexes, ka mea e kōkua i ke kino e hōʻalo i nā hōʻeha koʻikoʻi. ʻO ia nō ke kuleana no ka hakakā a i ʻole ka pane lele e kōkua i ka pale ʻana iā ʻoe ke ʻike ʻoe i ke koʻikoʻi a i ʻole ka weliweli.

E nānā kāua i kahi neuron pākahi i kahi kokoke.

Eia kahi aʻa peripheral. ʻO kēlā me kēia ʻāʻī nerve, a i ʻole nā ​​fascicles, he mau haneli o ke aʻalolo pākahi.

Eia kahi neuron pākahi, me kāna dendrites, axon, a me ke kino o ka pūnaewele. ʻO nā dendrite nā ʻano like me nā kumulāʻau. ʻO kā lākou hana ka loaʻa ʻana o nā hōʻailona mai nā neurons ʻē aʻe a mai nā pūnaewele sensory kūikawā e haʻi iā mākou e pili ana i kā mākou puni.

ʻO ke kino o ke kino ke keʻena nui o ka neurona. Loaʻa iā ia ka DNA o ka pūnaewele. Hoʻouna ka axon i nā hōʻailona mai ke kino o ke kelepona i nā neurons ʻē aʻe. Hoʻokomo ʻia nā neurons he nui e like me nā ʻāpana o ka uea uila. Pale ka pilikino iā lākou a ʻae i kā lākou mau hōʻailona e neʻe wikiwiki i ke axon. Me ka ʻole o ia mea, ʻaʻole hiki aku nā hōʻailona mai ka lolo i nā hui mākala i nā lālā.

ʻO nā neurons motor ke kuleana no ka mālama manawaleʻa ʻana i nā mākala ma ke kino holoʻokoʻa. ʻO ka hana o ka ʻōnaehana hopohopo e pili ana i ke kamaʻilio maikaʻi ʻana o nā neurons. No kahi hōʻailona uila e hele ma waena o nā neurons ʻelua, pono e hoʻololi mua ʻia i kahi hōʻailona kemika. A laila keʻa i kahi ākea ma kahi o ka miliona o ka ʻiniha ākea. Kapa ʻia ka hakahaka he synaps. Kapa ʻia ka hōʻailona kemika he neurotransmitter.

ʻAe nā Neurotransmitters i nā piliona o nā neurons i loko o ka ʻōnaehana hopohopo e kamaʻilio pū kekahi me kekahi. ʻO ia ka mea e hoʻohālikelike ai i ka ʻōnaehana o ke kino i ke kino o ke kino.

• Nā maʻi nerve Degenerative
• Nā maʻi Neuromuscular
• Nā maʻi ʻino peripheral