Kinesiology 1080A/B Lecture Notes - Phantom Limb, Alpha Motor Neuron
20 Oct 2013
School
Department
Course
Professor
Document Summary
People who have had amputations - still feel their limb there. Feeling of pain in phantom limb strong sensation (burning/itching) Some role in controlling complex movements; independent movements between our two hands. Some projections that go directly into spinal cord direct projection to spinal cord sma neurons can directly command alpha motor neurons. Internally generated movements sma plays important role movements based one one"s own decision to move. Movement sequencing - the ability to put many movements together sma plays important role. Coordination between hands, internally generated movements, supports movement sequencing. Triggered by external sensory events, and delayed action. Pma is important for visually guided movements: monkeys with pma damage are unable to avoid obstacles, pma damage in monkeys elicits preservation behaviour repetitive behaviour, single cell recordings show increase pma activity 60ms after visual stimuli presentation. M1 is active because its involved in all. Pma only becomes active when movement generated by a stimulus (sensory)
