麻木vs Tingling
皮肤的麻木和刺痛感是非常常见的感觉,我们都在某个时候经历了这些感觉。在大多数情况下,这些症状并不指向严重的条件。当我们用一只手臂睡在身体下时,当我们坐了很长时间时,当我们不长时间移动时,我们会感到麻木或感觉像许多销钉和针头在皮肤上刺伤。了解这些条件总是很重要的,因为它们有时可能是严重状况的症状。
麻木
麻木in neurological terms is defined as reduced or absent perception of sensations at a part of the body. This may be due to nerve transection, dissection, or inflammation around the nerve fibers. Sensory nerves travel from sensory organs to the thalamus via spino-thalamic tract in the spinal cord. They continue on to the cerebral cortex through the corona radiata. Lesions at the sensory organ (in this case, the skin), ascending nerve pathways, cord lesions, thalamic lesions, and radiate lesions will interfere with the perception of sensation. Strokes, tumors, metastatic cancers, spinal fractures, disk prolapse are a few commonly encountered causes for numbness. Metabolic conditions can also interfere with neuronal signal transmission. Diabetes causes a peripheral neuropathy, and mononeuritis multiplex, mononeuropathy, and polyneuropathy all of which can present with numbness. Electrolyte imbalances, especially alterations in sodium, potassium and calcium interfere with signal transmission.
Clinical examination can reveal the level of the lesion. Nerve conduction studies may give abnormal results according to the severity of the condition. Treating the root cause, rehabilitation, and supportive therapy are the principles of managing these conditions.
Tingling
Tingling is also known as “pins and needles”, and it is medically known asparesthesia. It is an abnormal sensation and feels like many pins and needles pricking at the skin. This is also a very common symptom. We all have experienced it after not moving for a while or after prolonged pressure at a specific site.Saturday night palsyis a condition with an interesting story. People get drunk on Saturday nights, and when they return home they sleep on the arm chair. Arms of the man drop over the arms of the chair and the arms of the chair dig into the inner aspect of the arms of the man. This applies direct pressure over the radial nerve. There is wrist drop, pins and needles over the back of the hands. When the fibula fractures the peroneal nerve may get damaged. This results in a foot drop and paresthesia of foot. In conditions like parotid tumors, Ramsey Hunt syndrome, cerebello-pontine angle tumors, the facial nerve can get compressed. One presentation may be paresthesia of one side of the face. Nerve conduction studies, computer tomography, and magnetic resonance imaging may be needed to arrive at a definitive diagnosis.
What is the difference between Numbness and Tingling?
•麻木是缺乏正常感觉的或暗淡的感知,而刺痛是一种异常的感觉。
• Numbness is due to interference of signal transmission in sensory nerves while paresthesia is due to excessive, repetitive irritation of the nerves.
Leave a Reply