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INTRODUCTION TO PERIPHERAL NERVOUS SYSTEM

INTRODUCTION TO PERIPHERAL NERVOUS SYSTEM. 2 6 . February. 2014 Wednesday. Kaan Yücel M.D., Ph.D . . Neuron. 100 billion neurons in the brain share a number of common features : Cell body metabolic center of the neuron Dendrites receives connections from other neurons. Axon

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INTRODUCTION TO PERIPHERAL NERVOUS SYSTEM

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  1. INTRODUCTION TO PERIPHERAL NERVOUS SYSTEM • 26. February.2014 Wednesday Kaan Yücel M.D., Ph.D.

  2. Neuron 100 billion neurons in the brain share a number of common features: Cell body metaboliccenter of theneuron Dendrites receives connections from other neurons. Axon transmits information to otherneurons Presynapticterminals

  3. Synapse terminal region of the axon where one neuron forms a connection with another and conveys information through the process of synaptic transmission. To communicate with the postsynaptic cell, the presynaptic neuron needs to release a chemical messenger.   Neurotransmitters AcetylcholineMemory Adrenaline DopamineReward, addiction Histamine Noradrenaline SerotoninMood

  4. Neuroglia Non-neuronal supporting cells Macroglia Microglia Ependymal cells

  5. PERIPHERAL NERVOUS SYSTEM • 12 PAIRS OF CRANIAL NERVES • 31 PAIRS OF SPINAL NERVES • ASSOCIATED STRUCTURES (SUCH AS GANGLIA)

  6. SENSORY MOTOR

  7. SOMATIC NERVOUS SYSTEM exteroceptors external stimuli (pain, touch, and temperature) proprioception receptors @ tendons, joint capsules, and muscles convey position sense http://www.nature.com/nrn/journal/v4/n7/fig_tab/nrn1141_F1.html

  8. http://www.med.umich.edu/lrc/coursepages/m1/anatomy2010/html/modules/NS_overview_module/NS_Overview_10.htmlhttp://www.med.umich.edu/lrc/coursepages/m1/anatomy2010/html/modules/NS_overview_module/NS_Overview_10.html

  9. AUTONOMIC NERVOUS SYSTEMSENSORY – AFFERTENT FIBERS interoceptors in visceral organs convey stretch as well as pressure, chemoreception, and pain.

  10. Gyrus & Sulcus & Fissure SULCI-depressions- DIVIDE THE BRAIN INTO GYRI -elevations- LOBESare MADE UP BY GYRI

  11. Sensoryhomunculus Motor homunculus

  12. Sensoryhomunculus Motor homunculus

  13. Important station that receives the main sensory tracts (except the olfactory pathway). • A station where much of the information is integrated and relayed to the cerebral cortex and many other subcortical regions. • A key role in the integration of visceral and somatic functions.

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