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103 Possible Causes for Knee Hyperreflexia

  • Vitamin B12 Deficiency

    On presentation, 50% of patients have absent ankle reflexes with relative hyperreflexia at the knees. Plantars are initially flexor and later extensor.[emedicine.medscape.com]

  • Anemia

    On presentation, 50% of patients have absent ankle reflexes with relative hyperreflexia at the knees. Plantars are initially flexor and later extensor.[web.archive.org]

  • Preeclampsia

    Back to top Hyperreflexia Hyperreflexia is when your reflexes are so strong that when your knee is tapped by a rubber “hammer,” your leg bounces back hard.[preeclampsia.org] Hyperreflexia is generally caused by an overreaction of the involuntary nervous system to stimulation.[preeclampsia.org]

  • Narrow Cervical Spinal Canal

    Deep tendon reflexes in the knee and ankle will be accentuated (hyperreflexia). Forced extension of the ankle may cause the foot to beat up and down rapidly (clonus).[spinepainbegone.com]

  • Primary Lateral Sclerosis

    On neurological examination, a left hemiparesis was noted with symmetric reflexes in the upper extremities, reduced reflexes at the right knee and ankle, and hyperreflexia[karger.com] […] at the left knee and ankle.[karger.com] There was hyperreflexia in the right arm and leg with a Hoffmann sign present on the right.[karger.com]

  • Binswanger Disease

    ; indication of hyperreflexia on the side of the adductor contraction; commonly thought to be due to stimulation of the adductor muscle on the hyperreflexive side through[strokecenter.org] , psychiatric changes, and myoclonus; form of spongiform encephalopathy crossed adductor reflex reflex contraction of the adductor magnus caused by tapping the opposite knee[strokecenter.org]

  • Neurilemmoma

    Positive spurling and abduction relief signs with knee and ankle jerk hyperreflexia were found. Acute myelopathy with radiculopathy was revealed.[journals.lww.com]

  • Kyphoscoliosis

    Arthralgia Camptodactyly Sclerotic vertebral endplates Spondyloepiphyseal dysplasia Enlarged epiphyses Methylmalonic acidemia Flattened epiphysis Synovitis Abnormality of the knee[mendelian.co] Hypsarrhythmia Brain atrophy Difficulty walking Full cheeks Tapered finger Myoclonus Encephalopathy Absent speech Short nose Cerebellar atrophy Hypoplasia of the corpus callosum Hyperreflexia[mendelian.co]

  • Myelopathy

    […] and ankle will be accentuated (hyperreflexia), Forced extension of the ankle may cause the foot to beat up and down rapidly (clonus), Scratching the sole of the foot may[necksolutions.com] […] difficulty (residual urine, dysuria) – 0 Urine retention Additional findings associated with myelopathy: Muscular tone in the legs will be increased, Deep tendon reflexes in the knee[necksolutions.com]

  • Cervical Myelopathy

    Thus these medical signs will become pathological: Increased tension in the leg muscles (Hyperreflexia) Accentuated reflexes of the knee and ankle Forced extension of the[dr-bertagnoli.com] […] and ankle will be accentuated (hyperreflexia), Forced extension of the ankle may cause the foot to beat up and down rapidly (clonus), Scratching the sole of the foot may[necksolutions.com] Serious urination difficulty (residual urine, dysuria) – 0 Urine retention Additional findings: Muscular tone in the legs will be increased, Deep tendon reflexes in the knee[necksolutions.com]

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