How does muscle weakness affect gait?
In contrast, gait is most sensitive to weakness of plantarflexors, hip abductors, and hip flexors. Weakness of individual muscles results in increased activation of the weak muscle, and in compensatory activation of other muscles.
Which muscle is weak in waddling gait?
A waddling gait happens because of weakness in your hip girdle and upper thigh muscles. To make up for the weakness, you sway from side to side and your hip drops with each step.
What causes proximal weakness?
Proximal myopathy presents as symmetrical weakness of proximal upper and/or lower limbs. There is a broad range of underlying causes including drugs, alcohol, thyroid disease, osteomalacia, idiopathic inflammatory myopathies (IIM), hereditary myopathies, malignancy, infections and sarcoidosis.
What part of the brain controls gait instability?
Four studies found that lower GM volume in temporal lobe regions [37,38,42,43], cerebellum [37,40,43,44] and basal ganglia, insula, and limbic systems [33,37,38,40] was associated with disrupted gait.
How may the walking gait be affected by a weakness in the gluteus medius muscle?
Bilateral weakness of the gluteus medius muscle: the gait shows accentuated side-to-side movement, resulting in a wobbling gait or “chorus girl swing”. Some people compensate this by flexing their trunk over the weight-bearing hip.
How do you test proximal muscle weakness?
Investigations of proximal weakness:
- Bloods.
- Urine dip and urine PCR.
- Nerve conduction studies and EMG (myopathic changes)
- MRI muscle eg.
- Muscle biopsy eg.
- Systemic assessment: ECG, CXR, Echo, lung function tests, HRCT, OGD/colonoscopy/barium swallow.
What does proximal weakness mean?
Proximal muscle weakness affects muscles closest to the body’s midline, while distal muscle weakness affects muscles further out on the limbs. Proximal muscle weakness can be seen in Cushing’s syndrome and hyperthyroidism.
What are the symptoms of proximal muscle weakness?
She had no muscle pain, episodes of dark urine, muscle twitching, visual disturbances, hearing loss, speech difficulties, dysphagia, numbness or tingling, bladder or bowel difficulties, fevers, rash or joint pain. She had met all milestones at a normal age and had normal development.
How does muscle wasting affect your gait posture?
Gait Posture 29 (1): 36-41 Muscle wasting in the quadriceps is affecting the knee movement in loading response, when patients trying to avoid flexion of the knee. Furthermore, the knee hyperextension later in stance might be due to an attempt to keep the body stable while compensating for the weak quadriceps.
What causes weakness in the proximal nervous system?
Proximal muscle weakness may be a manifestation of the pathology of the peripheral nervous system, most often diabetic neuropathy.
What causes weakness in the pelvic and proximal muscles?
It manifests itself with muscle weakness, and then with atrophy of the muscles of the pelvic girdle and the proximal parts of the legs; less often, the muscles of the shoulder girdle also suffer. The patient begins to use the characteristic “myopathic” techniques in the process of self-service.