Introduction to Nervous System PDF

Introduction to Nervous system ► Dr Azizah Ahmad Fauzi Division – Nervous system CN PNS S - - Extension of CNS...

Introduction to Nervous system ► Dr Azizah Ahmad Fauzi Division – Nervous system CN PNS S - - Extension of CNS Includes: * 12 Cranial nn (emerge from brain) * 31 pairs spinal nn (arise from s.cord) Spinal nerve categorized based on location location: 1 pair cogsidial nerve 5 pairs saccral nerve 5 pairs lumbar nerve 12 pairs thoracic nerve  Division – Nervous system CNS Functi PNS centre of perception, on conveys neural impulses site of integration of sensory info ⮚ to CNS as input from sensory initiation and coordination of receptors motor activity ⮚ from CNS as outputs to muscles & glands Somatic nervous syst vs Autonomic nervous syst  Somatic nervous system Autonomic nervous system conveys Conscious / unconscious sensation sensory information from head, body wall, extremities from viscera to control voluntary (skeletal) muscle involuntary structures motor (smooth muscles, activity of cardiac muscle & glands) General Allow reaction to outside stimuli Maintains homeostasis function SOMATIC NERVOUS SYST.  n tal tion flex D e ica l k re p r ap w j e Ja > > AUTONOMIC NERVOUS SYST. prepare body for …. normal function @ EMERGENCY restore energy !!  Organization Spinal nerve  Spinal nerve Rami communicans Sympathetic trunk & ganglia  CNS vs PNS : organization of nervous tissue  NERVOUS TISSUE RECEPTO RS NEUROGLI AL CELLS NEURONS  NERVOUS TISSUE RECEPTO RS NEUROGLI AL CELLS NEURONS  NERVOUS TISSUE RECEPTO RS NEUROGLI AL CELLS NEURONS ► Thank you