Neurological Glossary
Jacksonian march
Contiguous spread of electrical discharges through superficial cortex occurring with some seizures manifested by spread of muscular jerks to contiguous anatomical areas, such as when the jerking begins in the thumb and then spreads stepwise to the fingers, wrist, forearm, proximal arm, shoulder, and face
Jefferson fracture
Burst fracture of the anterior and posterior arches of C1 due to axial loading; typically stable
Jitter
Measure of the variability of potentials of two muscle fibres innervated by an individual axon as measured by single fibre electromyography; increased in myasthenia gravis
Juvenile myoclonic epilepsy (JME)
Primary generalized epilepsy syndrome usually beginning between ages 5 to 17 years, characterized by myoclonic (muscle-jerk), absence, and tonic-clonic seizures
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