Nervous system. WWW.YOUR-SCHOOL-URL.COM CNS(central nervous system) - brain + spinal cord PNS(peripheral nervous system) * cranial nerves(12 pairs) *

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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 Organization of the Nervous System

* Subdivisions of the nervous system Organization of the Nervous System

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

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

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

Supportive cells(neuroglia) Neuroglia CNS - oligodendrocytes : CNS 에서 말이집층 형성 - microglia : CNS 에서 이물질과 퇴화된 물질 제거, 포식 - astrocytes : 혈액에서 뇌까지 분자 수송 조절 CNS 에서 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

Myelin * Myelination

Myelin * Unmyelinated nerve fibers

Synapse and neural circuits * Synapse? : neuron 과 neuron 이 만나는 곳

Synapse and neural circuits * Chemical synapses and neurotransmitters

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

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