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101 Possible Causes for Weakness of the Extensor Muscles of the Hands

  • Entrapment Neuropathy

    The presence of any motor symptoms is more likely related to injury of the posterior interosseus nerve, which supplies the extensor muscles of the hand.[aafp.org] In radial tunnel syndrome, this point is over the anterior radial neck; in tennis elbow, it is at the origin of the extensor carpi radialis brevis muscle.[aafp.org] Generalized hand weakness is the presenting symptom of posterior interosseus nerve syndrome.[aafp.org]

  • Radiculopathy

    Injury or irritation of C6 nerve will result in weakness in the biceps muscles and wrist extensor muscles and tingling/numbness on lateral side of hand and thumb.[epainassist.com] This latter complaint could be confused with a painful weak grip associated with hand extensor and brachioradialis muscle groups.[aanos.org] Lesion of C5 nerve at foramina of spinal canal in neck may extend over deltoid muscle, as well as outer and lateral side of upper arm.[epainassist.com]

  • Cervical Radiculitis

    This latter complaint could be confused with a painful weak grip associated with hand extensor and brachioradialis muscle groups.[aanos.org] Patients with cervical radiculopathy may have a weak and painful grip secondary to pain originating proximally.[aanos.org]

  • Cervical Herniated Disc

    C5 – C6 (C6 nerve root) – Can cause weakness in the biceps (muscles in the front of the upper arms) and wrist extensor muscles.[westsidemedicaltx.com] C5-C6 (C6 nerve root): A C5-C6 disc herniation can cause weakness in the biceps (muscles in the front of the upper arms) and wrist extensor muscles.[spine-health.com] Numbness and tingling along with pain can radiate to the thumb side of the hand. This is one of the most common levels for a cervical disc herniation to occur.[westsidemedicaltx.com]

  • Ulnar Nerve Entrapment

    The presence of any motor symptoms is more likely related to injury of the posterior interosseus nerve, which supplies the extensor muscles of the hand.[aafp.org] In radial tunnel syndrome, this point is over the anterior radial neck; in tennis elbow, it is at the origin of the extensor carpi radialis brevis muscle.[aafp.org] Generalized hand weakness is the presenting symptom of posterior interosseus nerve syndrome.[aafp.org]

  • Tenosynovitis

    No muscle weakness was noted. Figure 1: Bilateral tenosynovitis of extensor tendons of wrist in case of Hansen's disease (borderline lepromatous).[ijmyco.org] […] examination revealed few ill to well defined, hypopigmented, normoesthetic to hypoesthetic macules on the back and ill-defined areas of hypoesthesia over ulnar aspect of both hands[ijmyco.org]

  • Hereditary Proximal Myopathy with Early Respiratory Failure

    : Most common Legs (Foot drop): 25% Weakness Hands Legs in most Muscles involved: Long finger extensors; Intrinsic hand; Thumb & index-finger Progression to legs: Toe & ankle[neuromuscular.wustl.edu] […] a lesser degree intrinsic hand muscles.[bmcneurol.biomedcentral.com] CK Muscle Welander Dominant TIA1 2p13 40 years Hands: Extensor Normal, or Slight Myopathic Vacuoles Finnish (Tibial;.[neuromuscular.wustl.edu]

  • Motor Neuron Disease

    There was mild to moderate weakness in intrinsic hand muscles, ankle dorsiflexors, and toe extensors bilaterally. Deep tendon reflexes were preserved.[jamanetwork.com] Most patients with ALS present with random, asymmetric symptoms, consisting of cramps, weakness, and muscle atrophy of the hands (most commonly) or feet.[merckmanuals.com] Amyotrophic lateral sclerosis (ALS) Most patients with ALS present with random, asymmetric symptoms, consisting of cramps, weakness, and muscle atrophy of the hands (most[merckmanuals.com]

  • Distal Hereditary Motor Neuropathy Type 1

    Distal weakness develops initially in intrinsic muscles of the feet and hands with development of wasting of musculature occurring slowly over time (Figure 18.12).[academlib.com] The first presenting motor symptom was paresis of extensor muscles of the great toe and later of extensor muscles of the other toes and of the feet.[nature.com] Ankle dorsiflexion, ankle eversión, and extensor hallucis longus weakness develop with more normal strength proximally.[academlib.com]

  • Young Adult-Onset Distal Hereditary Motor Neuropathy

    Neurological examination at age 11 revealed pes cavus, generalized areflexia, and severe weakness and atrophy of the intrinsic feet and hand muscles and the muscles in the[journals.plos.org] The first presenting motor symptom was paresis of extensor muscles of the great toe and later of extensor muscles of the other toes and of the feet.[nature.com] The MRC scores were grade 4 for flexors and extensors of the knees, grade 3 for the wrist flexor and extensor and finger flexor muscles, and grade 0 for the intrinsic hand[journals.plos.org]

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