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20 Cards in this Set
- Front
- Back
what are DTRs?
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involuntary , predictable, specific response to stimulus.
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what are DTRs dependent upon?
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intact reflex arc ( sensory receptor, afferent neuron, efferent neuron and responding to muscle.
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what type of pathway do DTRs travel?
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monosynaptic
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what happens when DTRs go through stretch sensitivity?
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stretch sensitive to afferents of neuromuscular spindle produce a muscle contraction in response to quick stretch stimulus.
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how is a motor response achieved?
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in response to sensory stimulation. when tendon is stretched , elicits a muscle contraction. this assess the integrity of the nervous system
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how are DTRs tested ?
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with a reflex hammer
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what are the DTR test procedures?
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pt should be relaxed (no muscle cont), muscle is placed on slight stretch, reflex hammer taps the tendon, immediate response happens, both sides should be tested, reflex then graded.
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how are DTRs graded?
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from hyporeflexia to exaggerated (hyperreflexia)
0=no response 1+=diminished response 2+=active normal response 3+=brisk/exaggerated response 4+=very brisk/hyperactive; abnormal response |
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when there is difficulty eliciting a reflex , what techniques can be performed?
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reinforcing techniques that cause distraction
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UMN lesions cause what response to DTR?
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increase
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LMN lesions cause what response to DTR?
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decrease
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Jaw DTR
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Inn: CN V
R: jaw rebounds and closes |
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Biceps tendon DTR
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Inn: C5-6 spinal level
R: contraction of the biceps muscle |
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Brachioradialis tendon DTR
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Inn: C5-6
R: elbow flexion and/ or forearm pronation |
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Triceps tendon DTR
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Inn: C7-8
R: elbow ext. or contraction of the triceps muscle |
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Patellar tendon DTR
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Inn: L3-4
R: knee ext |
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Achilles Tendon DTR
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Inn: S1-2
R: plantar flex. of foot |
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what are superficial cutaneous reflexes?
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light stroke applied to skin
brief contraction innervated by same spinal segment Ex: Babinski, abdominal reflex |
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when is the babinski test primarily performed?
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present with infants until 2 years. if positive in adults, that is a sign of a brain injury.
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how is the Babinski performed?
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stroke lateral foot across metatarsal heads-toe ext
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