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Related Anatomy

Related Anatomy. UNIT 7 Peripheral NERVOUS SYSTEM. CENTRAL brain and spinal cord. PERIPHERAL all nerves outside brain and spinal cord 2 branches Somatic - nerves that serve skeletal system and sense organs Autonomic - serve smooth muscles and heart.

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Related Anatomy

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  1. Related Anatomy UNIT 7 Peripheral NERVOUS SYSTEM

  2. CENTRAL brain and spinal cord PERIPHERAL all nerves outside brain and spinal cord 2 branches Somatic- nerves that serve skeletal system and sense organs Autonomic- serve smooth muscles and heart 1. Name the 2 DIVISIONS of the Peripheral Nervous System

  3. The 3 parts of a neuron • Dendrite- conduct impulse toward cell body • Axon- conduct impulse away from cell body • Cell body motor sensory

  4. More on Nerve cells • PNS axons and dendrites may be coated with a MYELIN Sheath(this speeds conduction)(White matter) • Gaps between axons and dendrites are called Synapses

  5. NERVE IMPULSE 1 • Sodium and Potassium Pump • POLARIZE DEPOLARIZE REPOLARIZE • Note where charges are and where Sodium and Potassium are in relation to nerve cell 2 3 4

  6. Nerve Impulse 1 3 2

  7. REFLEX • An automatic, involuntary response • Examples, heartbeat, breath, swallow, sneeze, vomit

  8. 2. 12 Pair of Cranial Nerves V Trigeminal- teeth V!! Facial- face IX Glossopharyngeal- swallow XII Hypoglossal- tongue

  9. Cervical Plexus- head, neck, shoulders, upper chest Brachial- shoulder, arm, hand Lumbar- lower abdominal, thigh, buttock, genitals Sacral- thigh, leg, foot 3. 31 Pr of Spinal Nerves

  10. SOMATIC Voluntary nerves that serve muscle and bone AUTONOMIC Involuntary nerves that serve internal organs 2 branches Sympathetic-emergency fight or flight Parasympathetic- normal at rest 4. 2 Divisions of the ANS

  11. Vocab • Efferent- motor • Afferent- sensory • Myelin sheath- coating on PNS nerves,born with none, form as we develop, must have to toilet train. Common disorder- MS • Synapse- gap where axons and dendrites meet but do not touch. Impulse may need neurotransmitter to cross this space. Common diseases- Parkinsons, Huntington, Alzheimers • Ganglia- mass of nerve cells outside CNS

  12. Vocab Continued • White Matter- covered in Myelin • Grey Matter- no Myelin • Meninges- protective covering of brain and spinal cord. Disease- Meningitis • CSF- cerebrospinal fluid, clear • CNS- central nervous system • PNS- peripheral nervous system • ANS- autonomic nervous system

  13. The End

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