neurology

The anterior fascicle is a bundle of nerve fibers that carries motor and sensory information in the nervous system. In human neuroanatomy, fascicles are subdivisions of peripher...

Early symptoms of Lou Gehrig’s disease, or amyotrophic lateral sclerosis (ALS), are often subtle and easy to overlook. They typically begin with mild muscle weakness, twitchin...

Cataplexy is a sudden, brief loss of voluntary muscle tone triggered by strong emotions. It is most commonly linked with narcolepsy type 1. Episodes range from mild weakness in...

The trochlear nerve, labeled as Cranial Nerve 4 or CN4, is a purely somatic motor nerve that innervates the superior oblique muscle of the eye. It is unique among cranial nerves...

Cataplexy is a sudden, brief loss of voluntary muscle tone triggered by strong emotions, such as laughing, crying, or being surprised. It is most commonly linked to narcolepsy t...

Sleep seizures are episodes of abnormal electrical activity in the brain that occur while a person is asleep or transitioning to wakefulness. They can involve changes in movemen...

Motor posturing refers to abnormal positions of the arms, legs, or trunk that indicate impairment in the central nervous system, typically involving damage to corticospinal path...

Multiple ring-enhancing lesions describe distinct abnormalities seen on MRI or CT where the margins of a lesion light up after contrast, while the center may appear darker. Thes...

Decerebrate posturing is a distinct abnormal posture in which the arms extend straight by the sides, the wrists are pronated and fingers flexed, and the legs extend with plantar...

An EMG can return normal even when you experience real pain. This does not mean your symptoms are imaginary. It usually means the test did not capture the problem, the issue is...