Neurophysiology of The Nervous System

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Presentation transcript:

Neurophysiology of The Nervous System Dr. Loai Alzghoul Loai.physiology@yahoo.com

Organization of the nervous system

Organization of the nervous system

Levels of the CNS Spinal cord Brain stem and sub cortical Cerebral cortex

3 Major Levels of CNS Function The spinal cord level. more than just a conduit for signals from periphery of body to brain and vice versa. cord contains: walking circuits. reflexes circuits.

The brain stem and subcortical Contains: medulla, pons, mesencephalon, hypothalamus, thalamus, cerebellum and basal ganglia. Controls subconscious body activities: arterial pressure, respiration, equilibrium, feeding reflexes, emotional patterns.

The Higher Brain or Cortical Level Higher order functions : language, thoughts and personality Large memory storehouse. Each portion of the nervous system performs specific functions, but it is the cortex that opens the world up for one’s mind.

Organization of the Nervous System Sensory Division tactile, visual, auditory, olfactory. Motor Division respond to and move about in our environment. Integrative Division process information, creation of memory.

Somatosensory Axis of the Nervous System Figure 45-2

Skeletal Motor Nerve Axis of the Nervous System Figure 45-3

Terminology: Afferent VS Efferent

Terminology: 1st order , 2nd order and 3rd order neurons

Nervous tissue Gray matter : neuron cells White natter: myelinated axons

Neuron Structure

Types of neurons

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