| cogwheel ocular movements | Loose, jerky ocular rotations replacing smooth following rotations. (05 Mar 2000) |
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| cogwheel phenomenon | A sudden brief halt in usually smooth respiration or other motor activity. Synonym: Negro's phenomenon. (05 Mar 2000) |
| cogwheel respiration | The inspiratory sound being broken into two or three by silent intervals. Synonym: interrupted respiration, jerky respiration. (05 Mar 2000) |
| cogwheel rigidity | <clinical sign, neurology> A type of rigidity seen in parkinsonism in which the muscles respond with cogwheel-like jerks to the use of constant force in bending the limb. (21 Jun 2000) |