96 dorsal column on the other hand in the dorsal

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96
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Dorsal column:- On the other hand in the dorsal columns the fibres from the sacral and lumbar segments remain medial wheres as cervical and thoracic remain lateral. 97
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So the arrangement of these pathways from medial to lateral in spinal cord:- Spinothalamic tract  Cervical  Thoracic  Lumbar  Sacral. Dorsal column  Sacral  Lumbar Thoracic  Cervical. 98
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99
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Spinal shock is characterised by - (PGI JUNE 03) a) Spasticity b) Wasting c) Sensory loss d) urinary retention e) Areflexia 101
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Mechanism of Spinal shock:- When the spinal cord is suddenly and virtually or completely severed, three disorders of function are at once evident:- i) All voluntary movement in parts of the body below the lesion is immediately lost. ii) All sensations from the lower part is abolished, iii) Reflex function in all segments of isolated spinal cord are suspended. 102
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103
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The explanation of spinal shock, is believed to be the:- Sudden interruption of suprasegmental descending fibre system that normally keep the spinal motor neurons in a continuous state of subliminal depolarization. (Release phenomenon). As a result of their sudden separation from higher levels the neural elements below the lesion fails to perform their normal function. 104
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Features of spinal shock: Complete paralysis below the level of the lesion. All sensations from the lower part is abolished’. Control of autonomic function below the level of the lesion is impaired. Vasomotor tone, sweating and piloerection in the lower parts of the body are temporarily abolished. Systemic hypotension is severe. 105
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Bladder and bowel including their sphincters are flaccid. Urine accumulates until the intravesical pressure is sufficient to overcome the sphincters ; then driblets escape (overflow incontinence). Passive distention of the bowel, retention of feces and absence of peristalsis (Paralytic ileus). Genital reflexes (Penile erection, bulbocavernous reflex, contraction of dartos muscle) are abolished or profoundly depressed. 106
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Spinal shock is characterized by all except - (PGI 09) a) Spastic paralysis b) Flaccid paralysis c) Urinary bladder involvement d) Areflexia e) Sensory loss A 107
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Cervical cord injury does not cause – (PGI June 99) a) Horner’s syndrome b) Loss of sensation over face c) Spasticity of foot d) Wasting with fasciculations of lower limb 108
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109
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Cervical cord injury does not cause – (PGI June 99) a) Horner’s syndrome b) Loss of sensation over face c) Spasticity of foot d) Wasting with fasciculations of lower limb B,D Face – Trigeminal Nerve. 110
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Painless burn in hand is a characteristic feature of- a) Syrinyomyelia (AI99) b) Thalamic syndrome c) Cord compression d) Systemic-lupus-erythematosis 111
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Syringomyelia is a chronic progressive degenerative disease of the spinal cord.
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  • Winter '16
  • jean grey

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