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The light bulb sign is best observed on an AP radiograph of the shoulder. [5] Key features include: Rounded humeral head: The humeral head appears symmetrically rounded, resembling a light bulb due to internal rotation. Loss of normal glenohumeral overlap: The humeral head is posteriorly displaced, disrupting the alignment with the glenoid cavity.
The sensation can feel like it goes up or down the spine. It is painful for some, although others might simply feel strange sensations. [1] In many people, it is elicited by bending the head forward. [2] It can also be evoked when a practitioner pounds on the cervical spine while the neck is flexed; this is caused by involvement of the ...
The feeling experienced by the individual is described as uncontrollable jolts common to receiving a mild electric shock. [5] The sudden jerks and twitching of the body can often be so severe that it can cause a small child to fall. A myoclonic seizure (myo "muscle", clonic "jerk") is a sudden involuntary contraction of muscle groups. The ...
The use of electric shocks to torture political prisoners of the Brazilian military dictatorship (1964 - 1985) is detailed in the final report of the National Truth Commission, published December 10, 2014. [52] The parrilla (Spanish for 'grill') is a method of torture whereby the victim is strapped to a metal frame and subjected to electric ...
Similar brief shocks can be experienced when any other nerve is tweaked (e.g. a pinched neck nerve may cause a brief shock-like paresthesia toward the scalp). In the older age group, spinal column irregularities may tweak the spinal cord briefly when the head or back is turned, flexed, or extended into brief uncommon positions (Lhermitte's sign).
If the person has myelopathy, there will be slow abduction and flexion of the fingers on the ulnar side. The degree of loss of sensation may be different on both upper limbs. [2] Lhermitte sign is performed by asking a person to gently extend the neck. Those with cervical myelopathy will produce a feeling of electrical shock down the spine or arms.
A detailed description of the syndrome and the name "exploding head syndrome" was given by British neurologist John M. S. Pearce in 1989. [15] More recently, Peter Goadsby and Brian Sharpless have proposed renaming EHS "episodic cranial sensory shock" [1] as it describes the symptoms more accurately and better attributes to Mitchell.
This nerve can cause an electric shock-like sensation by striking the medial epicondyle of the humerus posteriorly, or inferiorly with the elbow flexed. The ulnar nerve is trapped between the bone and the overlying skin at this point. This is commonly referred to as bumping one's "funny bone". [2]