PSB-2000 Chapter Notes - Chapter 8: Subthalamic Nucleus, Tabes Dorsalis, Tetraplegia
Document Summary
Myasthenia gravias: autoimmune disease that affects neuromuscular junction (antibodies against receptors). Proprioceptor: receptor that detects the position/movement of a part of the body. Golgi tendon organs: respond to increase in muscle tension. Stimulus receptor sensory neuron association neuron motor neuron effector response. Sequence: primary motor cortex brain stem spinal cord muscles. Less involved in involuntary actions like: laughing, coughing. Motor homunculus has some overlapping of body representation parts in map. Stimulation of spot in motor cortex different responses of duration: Motor cortex could active also during intention of movement (even in paralyzed subjects) Posterior parietal cortex position of the body in space, planning movements. Provides sensory information to the primary motor cortex and directly to spinal cord. Responds to light, noises, and signs of a movement. Planning of movement; organization, logic and organization of movements. Receives info about the target and body position. Very active during 1-2 secs previous to movement. Soft stimulus application expectation of movement to start.
