cogwheel phenomenon

(redirected from Negro phenomenon)

cog·wheel phe·nom·e·non

a sudden brief halt in usually smooth respiration or other motor activity.
Synonym(s): Negro phenomenon
A circular jerking rigidity in flexion and extension in a background of tremor, which continues throughout an entire range of movement, a finding typical of parkinsonism; it may also be ‘smoothly’ rigid, in which case it is termed lead pipe rigidity

cogwheel phenomenon

Neurology A circular jerking rigidity in flexion and extension in a background of tremor, which continues throughout an entire range of movement, a finding typical of parkinsonism; it may also be 'smoothly' rigid, and termed lead pipe rigidity. Cf Clasp knife phenomenon, Gegenhalten.

Negro,

Camillo, Italian neurologist, 1861-1927.
Negro cogwheel rigidity - Synonym(s): Negro phenomenon
Negro phenomenon - a sudden brief halt in usually smooth respiration or other motor activity. Synonym(s): cogwheel phenomenon; Negro cogwheel rigidity; Negro rigidity
Negro rigidity - Synonym(s): Negro phenomenon