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Transcript
Related Anatomy Unit 6 Central NERVOUS SYSTEM 1. Name the 2 DIVISIONS of the 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 2. Terms • Nerve- bundle of axons wrapped in connective tissue • Ganglion- cell bodies grouped together outside brain or spinal cord • Tract- pathway for axons • Nuclei- mass of cell bodies ( ganglion) The 3 parts of a neuron • Dendrite- conduct impulse toward cell body • Axon- conduct impulse away from cell body • Cell body motor sensory 3. 4 Basic Processes of the Nervous System • Reception- stimuli • Transmission- Sensory input- from area to brain Afferent • Integration- sums up input to allow brain to make decision • Motor output- efferent- cause response 3 TYPES of NEURONS • Sensory- afferent • Motor- efferent • Interneuron- in CNS (brain and spinal cord) 4. 7 Divisions of the Brain • Brain stem Medulala Oblongata- regulate heartbeat, breathing, BP Pons- bridge between Cerebellum and CNS Midbrain- vision, hearing, touch • Cerebellum- movement • Hypothalmus- hunger, sleep, thirst • Thalmus- all sensory except smell • Cerebrum- largest, conscious thought LOBES of BRAIN • FRONTAL- motor (FM) • TEMPORAL- speech and hearing (EAR) • PARIETAL- sensory (PS) • OCCIPITAL- visual ( eyes in back of head) Misc Brain INFO • Right side of brain controls left side of body • Right side of brain- art, music, imagination • Left side of brain- logic, math, science • Brain stem is the size of your thumb 5. Spinal Cord Functions • Reflex • Transmission • Tube protected by vertebrae and CSF (clear) CNS Protection Spinal cord Brain • Vertebrae • CSF • Bones of Skull • CSF • Menninges (grey matter) 10. Vocab • Efferent- motor • Afferent- sensory • Ganglia- mass of nerve cells outside CNS 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
