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Clonus results due to an increased motor neuron excitation (decreased action potential threshold) and is common in muscles with long conduction delays, such as the long reflex tracts found in distal muscle groups. [1] Clonus is commonly seen in the ankle but may exist in other distal structures as well. [2]
Stimulus-sensitive myoclonus is triggered by a variety of external events, including noise, movement, and light. Surprise may increase the sensitivity of the patient. Sleep myoclonus occurs during the initial phases of sleep, especially at the moment of dropping off to sleep, and include familiar examples of myoclonus such as the hypnic jerk ...
[7] [4] [2] [3] The LFCN then traverses to the lateral border of the psoas major muscle, crosses the iliacus muscle, and continues to the anterior superior iliac spine (bony landmark). The nerve then passes between inguinal ligament (passes under) and sartorius muscle (passes over). It then divides into an anterior and posterior branch as it ...
Paresthesias of the hands, feet, legs, and arms are common transient symptoms. The briefest electric shock type of paresthesia can be caused by tweaking the ulnar nerve near the elbow; this phenomenon is colloquially known as bumping one's "funny bone". Similar brief shocks can be experienced when any other nerve is tweaked (e.g. a pinched neck ...
The triceps surae consists of two muscles located at the calf – the two-headed gastrocnemius and the soleus.These muscles both insert into the calcaneus, the bone of the heel of the human foot, and form the major part of the muscle of the posterior leg, commonly known as the calf muscle.
The calf (pl.: calves; Latin: sura) is the back portion of the lower leg in human anatomy. [1] The muscles within the calf correspond to the posterior compartment of the leg. The two largest muscles within this compartment are known together as the calf muscle and attach to the heel via the Achilles tendon. Several other, smaller muscles attach ...
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For example, they can respond to hypoxia, hypoglycemia, hypo-osmolarity, the presence of muscle metabolic products, and even light or sensitive touch. [8] C fiber receptors include: C fiber nociceptors responsible for the second, burning pain; C fiber warming specific receptors responsible for warmth; ultra-slow histamine-selective C fibers