Lecture 3 Neuroanatomy

Lecture 3 Neuroanatomy - Neuroanatomy Objectives 1...

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Neuroanatomy
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Objectives: 1. Organization of the nervous system 2. Basic nervous system anatomy 3. Basic structure/function of Neurons
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CNS PNS Somatic Autonomic Somatic Autonomic { {
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Organization of the Nervous System Nervous system Central Nervous System (CNS) Peripheral Nervous System (PNS) Brain Spinal Cord Somatic Nervous System Autonomic Nervous System Parasympathetic Nervous System Sympathetic Nervous System
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Organization of the Nervous System Nervous system Central Nervous System (CNS) Peripheral Nervous System (PNS) Brain Spinal Cord Somatic Nervous System Autonomic Nervous System Parasympathetic Nervous System Sympathetic Nervous System
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Somatic Nervous System Composed of 2 types of nerves: - Afferents - carry sensory signals from the skin , skeletel muscles, joints, eyes, ears… INTO the CNS for data delivery INTO the CNS for data delivery ( A fferents “ A rrive”) - Efferents - carry motor signals for the CNS to skeletal muscles (voluntary muscles) ex. Lifting arm OUT of the CNS for target OUT of the CNS for target control control ( E fferents “ E mbark”)
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Motor Output (Efferents) Sensory Input (Afferents) →→→ Processing Bam! Bam! Somatic Nervous System
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Somatic Nervous System Sensory Input To Sensory neurons in the skin Afferent Data delivery
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Somatic Nervous System Efferents Efferents Don’t touch, Move away! Processed information vs. Reflex
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Somatic Nervous System Reflex- Data to Spinal cord only Reflex
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Somatic Nervous System Efferents Efferents Reflex Brain not involed in control, spinal cord only
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Organization of the Nervous System Nervous system Central Nervous System (CNS) Peripheral Nervous System (PNS) Brain Spinal Cord Somatic Nervous System Autonomic Nervous System Parasympathetic Nervous System Sympathetic Nervous System
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