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A look at the causes of muscle weakness as well as Janda’s classification of muscle imbalance patterns. Overused muscle shortens over time, changing the muscle’s length–tension curve and becoming more readily activated and weaker after time. Through his observations of patients with neurological disorders and chronic musculoskeletal pain, Janda found that the typical muscle response to joint dysfunction is similar to the muscle patterns found in upper motor neuron lesions, concluding that ...
Muscle length testing involves elongating the muscle in the direction opposite of its action while assessing its resistance to passive lengthening. Clinicians do not have to perform muscle length testing on every muscle listed; instead, they should assess the muscles that the postural and movement pattern analysis indicate as being possibly tight. Muscle Normal ranges or end feel Iliopsoas 0° hip extension, 10° with overpressure Rectus femoris 90° knee extension, 125° with ...
Treatment of muscle weakness aims at stimulating and increasing the response of the muscle spindle of the pseudoparetic muscle. Tapping over the muscle belly can be facilitatory, as it promotes localized quick stretching of the muscle fibers that enhances the myotatic reflex and therefore the contractility of the muscle. Drop and catch is basically a quick stretch technique to facilitate the muscle spindle and muscle contraction via the myotatic reflex.
