3 parts of a nerve cell a. Dendrites b. Cell Body c. Axon 2. Types of nerves: a. Afferent Neurons=sensory‚ conduct impulses TO the brain b. Efferent Neurons=motor‚ conduct impulses AWAY from the brain c. Interneurons 3. Types of Cells in the CNS: a. Astrocytes b. Microglia c. Oligodendrocytes-form myelin sheath of CNS d. Schwann Cells-form myelin sheath of PNS 4. White matter vs. Gray matter 5. Myelin and its function 6. Nodes of Ranvier 7. Ganglion-clump of nerve cell bodies in
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provides longitudinal support as a component of the coccygeal ligament. A) conus medullaris B) filum terminale C) cauda equina D) dorsal root E) ventral root Answer: B 3) Spinal nerves are A) purely sensory. B) purely motor. C) both sensory and motor. D) interneuronal. E) involuntary. Answer: C 4) The spinal cord consists of five regions and ________ segments
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of the middle phalanx Zone 2 extensor tendon injury‚ which results mallet finger deformity Dorsal digital nerves- arise from the superficial branch of the radial nerve and the dorsal branch of the ulnar nerves PALM Palmar interosseus( between the bones) Abductor ( 2 heads- transverse and oblique head) Volar plate (MP joint) First dorsal interosseus - deep ulnar nerve injury‚ these muscles would be affected 3 volar interossei adduct the fingers Function of the lumbricals(
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combating it. Nerves located outside the brain and spine are less protected and are subject to injury during competitive sports causing this loss in memory and concentration. Altogether‚ sports injuries have the dangerous ability to disorient and permanently damage. Sports injuries have varying effects ranging from minor and temporary damage to the fatal‚ permanent damage that can occur. Concussions‚ for example‚ have various levels of severity. Sadness‚ irritability‚
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Alcoholic neuropathy defines the nerve disorder associated with excessive alcohol consumption. Nerve function is reduced‚ it is believed‚ by the toxins in alcohol and nutritional deficiencies. Normal symptoms for alcoholic neuropathy include lack of sensation‚ tingling‚ frail ankles and muscles and burning feet. Diarrhea‚ nausea/vomiting‚ constipation‚ incontinence of the bladder and impotence in men are some other symptoms. However‚ in severe cases of alcoholic neuropathy‚ major damage is done
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Nervous System- Nerve Impulse When a stimulus is strong enough‚ a nerve impulse is generated in an "all or none" response which means that a stimulus strong enough to generate a nerve impulse has been given. The stimulus triggers chemical and electrical changes in the neuron. Before an impulse is received‚ a resting neuron is polarized with different charges on either side of the cell membrane. The exterior of the cell is positively charged with a larger number of sodium ions present compared
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and fingers are innervated by three major nerves‚ which are; the Median‚ the Radial and the Ulnar nerves. These nerves can be susceptible to injuries and compression at different locations on their paths as they innervate the skin and muscles of the forearm‚ hand and fingers. Having established that‚ the carpal tunnel is a relatively narrow passageway that is formed anteriorly by the flexor retinaculum and posteriorly by the carpal bones. The median nerve which is the most superficial structure and
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The knee joint is formed by the articulation of the distal end of the femur and the proximal end of the tibia. The fibula is only involved to the extent that it serves as an attachment site for connective tissue. In this paper‚ the anatomy of the joint will be discussed. The knee is a hinge-type‚ diarthrotic‚ or freely moveable joint. Also referred to as a synovial joint‚ the 2 articulating ends of bone are encased in a capsule that lubricates the joint with synovial fluid to reduce friction
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(ribs 1 to 8) while the insertion of this muscle is located on the costal surface of the medial border of the scapula. Therefore‚ this muscle is innervated by the long thoracic nerve which is a branch of the brachial plexus (ventral rami of C5‚6‚7) by virtue of the nerves anterior relation to the muscle. The long thoracic nerve runs over Serratus Anterior during its course on the medial wall of the axilla on the mid axillary line‚ after exiting through scalene muscle and passing over the first rib and
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thin cord of nerves. The peripheral nerves that extend out to many parts of the body arise from the spinal cords thirty-one segmental pairs of nerves. The cervical region contains eight pairs of cervical nerves‚ the thoracic contains twelve pairs of thoracic nerves‚ the lumbar contains five pairs of lumbar nerves‚ the sacral contains five pairs of sacral nerves‚ and the coccygeal contains one pair of coccygeal
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