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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diagonally. * opaque white tissue normal – white * systemic problems – icteric sclera b. CORNEA – dense transparent layer. The cornea is the transparent‚ clear layer at the front and center of the eye. It is well supplied with nerve endings. The main purpose of the cornea is to help focus light as it enters the eye. If one wears contact lenses‚ the contact lens rests on the cornea. normal – transparent‚ smooth‚ shiny & bright accident or eye injury – cloudy areas or specks
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of the body. Ultimately‚ all forms will cause nerve damage in the arms/hands and legs/feet‚ causing sensory loss in the skin and muscle weakness. This may cause the person with leprosy to lose an extremity affected by the disease. B: Schwann cells are involved in many important aspects of peripheral nerve biology. The conduction of nervous impulses along axons‚ nerve development and regeneration‚ trophic support for neurons‚ production of the nerve extracellular matrix‚ modulation of neuromuscular
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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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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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Stenosis means "closing in" or "choking". Spinal stenosis describes a condition in which the nerves in the spinal canal are closed in‚ or compressed. The spinal canal is the hollow vertical hole formed by the bones of the spinal column. Anything that causes this bony hole to shrink can squeeze the nerves inside. This narrowing can irritate the nerve roots that branch out from the spinal cord‚ or it can squeeze and irritate the spinal cord itself. This may cause pain‚ numbness‚ or weakness‚ most
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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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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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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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