PHTY209 Lecture Notes - Lecture 6: Upper Motor Neuron Lesion, Corticobulbar Tract, Extrapyramidal System
Document Summary
Describe the components and functions of the extrapyramidal motor system describe the importance of sensory information in the control of movement. Provide information about limb position before movement onset, and is essential for control of posture and balance. Alter motor patterns to deal with environmental perturbations. Feedforwad: anticipatory use of sensory information to prepare for movement. Feedback: use of sensory information during or after movement to modify or make corrections to ongoing & future movements. Muscle spindles, golgi tendon organs, joint receptors, touch/pressure receptors provides information about weight bearing & relative positions of body parts. Provides information about visual cues for movement and guidance during movement e. g. reaching for object use vision to fixate on object, provide corrective adjustments to achieve contact with object. Input from inner ear receptors tells us about head position relative to gravity and during movement. Loss of sensory contribution to movement control leads to: disruption in limb positioning.
