oculomotor apraxia.
The absence or defect of controlled, voluntary, and purposeful eye movement
Transmissible Cancer Found in Freshwater Fish
UVM researchers have identified a transmissible cancer—melanoma—in brown bullhead catfish from Lake Memphremagog, the first such cancer documented in a freshwater fish. Genome analysis shows the cancer cells spread like parasites among fish, with about a third of the local population affected and no human risk, while transmission may be linked to spawning and environmental factors.
Health · 8 sources · Jul 23, 2026Read itThe journal
Open the journal →The conversation starts in the journal — be the first to post.
About oculomotor apraxia
Oculomotor apraxia (OMA) is the absence or defect of controlled, voluntary, and purposeful eye movement. It was first described in 1952 by the American ophthalmologist David Glendenning Cogan. People with this condition have difficulty moving their eyes horizontally and moving them quickly. The main difficulty is in saccade initiation, but there is also impaired cancellation of the vestibulo-ocular reflex. Patients have to turn their head in order to compensate for the lack of eye movement initiation in order to follow an object or see objects in their peripheral vision, but they often exceed their target. There is controversy regarding whether OMA should be considered an apraxia, since apraxia is the inability to perform a learned or skilled motor action to command, and saccade initiation is neither a learned nor a skilled action.
Everything about oculomotor apraxia →