วันเสาร์ที่ 24 ตุลาคม พ.ศ. 2552

131. Sign นี้เกิดจากกลไกใด?

Sign นี้เกิดจากกลไกใด? พบในภาวะใดบ้าง



Clonus
Clonus (from the Greek for "violent, confused motion")
-is a series of involuntary muscular contractions due to sudden stretching of the muscle.
-Clonus is a sign of certain neurological conditions, and is particularly associated with upper motor neuron lesions such as in stroke, multiple sclerosis, spinal cord damage and hepati encephalopathy.
-Unlike the small, spontaneous twitching known as fasciculations (usually caused by lower motor neuron pathology), clonus causes large motions that are usually initiated by a reflex.
•Clonus is most common in the ankles, where it is tested by rapidly flexing the foot upward (dorsiflexion). It can also be tested in the knees by rapidly pushing the patella towards the toes. Only sustained clonus (5 beats or more) is considered abnormal.

2 ความคิดเห็น:

  1. ไม่ระบุชื่อ25/10/52 09:39

    clonus
    UMN sign
    เกิดจาก hign brain fuction control tract ของมันไม่ได้

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  2. ไม่ระบุชื่อ25/2/56 03:16

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