Ideomotor apraxia

Fascinating MSc lecture today on Ideomotor apraxia. Key feature is inability to mime an action. Inconclusive as to why this happens. Patients can commonly use a knife, for example, but can't mime using a knife without a knife in hand. I think that it might be a sensory recognition memory cue effect. We pick up and heft things to feel how to use them (like archaeologists do when they reconstruct tools from bits from a dig site and then play around with them to see how they fit in the hand and what they could have done).

I think that the brain does have a cloud of interconnections that are interacting like a 3D matrix and it is so complex that we are not able to map it simply yet. It may not be just memory or just postural memory or just automatic engrams of motor coordination. It is probably a great deal more complex.