Nervous system.

Presentation on theme: "Nervous system."— Presentation transcript:

1 Nervous system

2 제11장 신경계통 (Nervous system) 구미대학교 작업치료과

3 Organization of the Nervous System
CNS(central nervous system) - brain + spinal cord PNS(peripheral nervous system) * cranial nerves(12 pairs) * spinal nerves(31 pairs) - cervical(8) - thoracic(12) - lumbar(5) - sacral(5) - coccygeal(1) ANS(autonomic nervous system) * sympathetic division * parasympathetic division Term neuron, neuroglia, meninges motor neuron, sensory neuron CSF, plexuses et al

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6 Organization of the Nervous System
* Subdivisions of the nervous system

7 Functions of the Nervous System
* Functional classes of neurons 1. sensory(afferent) neurons 2. interneurons(association neurons) 3. motor(efferent) neurons

8 Neuron Neuron Cell body - nucleus - nissl body Dendrites(input)
Axon(output) - myelin - schwann cell - node of ranvier * 말이집의 유무에 따라 - 말이집신경섬유 - 민말이집경섬유

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10 Neuronal variety Structural classification - multipolar neuron
- bipolar neuron - unipolar neuron - anaxonic neuron

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12 Supportive cells(neuroglia)
CNS - oligodendrocytes : CNS에서 말이집층 형성 - microglia : CNS에서 이물질과 퇴화된 물질 제거, 포식 - astrocytes : 혈액에서 뇌까지 분자 수송 조절 CNS에서 신경원 사이의 구조적 지지 - ependymal cells : 뇌실과 척수중심관 안쪽면을 싸고 있음 PNS - neurolemmocytes, Schwann cells : PNS 말이집층 형성 - satellite cell : PNS 신경절 내의 신경원 세포체 지지

13 Myelin * Myelination

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15 Myelin * Unmyelinated nerve fibers

16 Synapse and neural circuits
: neuron과 neuron이 만나는 곳

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18 Synapse and neural circuits
* Chemical synapses and neurotransmitters

19 Synapse and neural circuits
- diverging circuit - converging circuit - reverberating circuit - parallel after-discharge circuit

20 중추신경계통의 배아

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