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14 Cards in this Set
- Front
- Back
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What will happen to sacral reflexes if lose connection w brain?
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Exaggerated sacral reflexes
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Sympathetic NS
Parasympathetic NS |
in paravertebral chain gang & prevertebral gang
Near or in effector organ |
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Pregang of Sympathetic NS release
Postgang of sympathetic NS release |
Ach on nicotinic receptors
NE on adrenergic receptors |
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Pregang of Parasympathetic NS
Postgang of Parasympathetic NS |
Release Ach onto nicotinic cholinergic receptors
Release Ach onto muscarinic cholinergic receptors |
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Somatic motor innervation
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Pudendal nerve (Ach)
Bladder contraction to prevent micturition |
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Parasympathetic innervation
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pelvic nerve (Ach)
Detrusor m contracts, bladder empties |
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Sympathetic innervation
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NE released
Detrusor muscle will relax (bladder fills) |
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Bladder fills and accommodates to increasing volume of urine with only slight inc. in pressure. As bladder walls become distended, pressure inc to micturition threshold
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Filling phase
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Detrusor m contracts vigorously and the muscles of the EUS and pelvic floor relax
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Voiding phase
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If can go to the bathroom now
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Pontine Micturition facilitates reflex sending down signals to inhibit sympathetic pathway
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If cannot go to the bathroom now
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Pontine micturition center sends signals down to inhibit parasympathetic pathways
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No reflex emptying of bladder
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neurogenic bladder
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If SC transected above lumbar region, spinal voiding reflex can still operate
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Uninhibited neurogenic bladder
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Occurs with sacral SC damage
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Flaccid or atonic bladder
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