Download Lecture Slides Voluntary Movement - Physiological Psychology | PSYC 372 and more Study notes Psychology of Human Development in PDF only on Docsity! 1 Listen to the audio lecture while viewing these slides 1 Psychology 372 Physiological Psychology Steven E. Meier, Ph.D. Voluntary Movement Brain and Spinal Systems 2 Psyc 372 – Physiological Psychology Motor Control • Is organized hierarchically and in parallel • Lower – Reflexes and rhythmic motor patterns • Higher – Give commands without having to specify the details of the motor system. • Lots of overlap 3 Psyc 372 – Physiological Psychology Have Three Levels of Control • Cortex • Highest • Primary Motor Cortex (Area 4) • Lateral Premotor area (Area 6) • Supplementary Motor area (Also part of Area 6) • Brain Stem • Spinal Cord • Other structures • Cerebellum • Basal Ganglia 4 Psyc 372 – Physiological Psychology Cortex • Precentral Gyrus (Primary Motor Cortex) • Premotor area (Superior and Middle Frontal Gyrus) • Supplementary Motor area (Superior Frontal Gyrus) • Tertiary Motor Areas (Middle and Inferior Frontal Gyrus) • Issues commands that act on lower levels 5 Psyc 372 – Physiological Psychology Cortex 6 Psyc 372 – Physiological Psychology Precentral Gyrus Broadman’s Area 4 • Is the Primary Motor Cortex • Controls the major systems that control body movement. 2 7 Psyc 372 – Physiological Psychology Precentral Gyrus Broadman’s Area 4 • Motor cortex is somatotopically organized (motor homunculus). • Most is taken up with the neck, mouth, face and hands. 8 Psyc 372 – Physiological Psychology Precentral Gyrus Receives Input From • Premotor cortex • Supplemental motor area • Frontal association cortex • Post Central Gyrus Movement involves all of these structures 9 Psyc 372 – Physiological Psychology Premotor Cortex and Supplementary Motor Cortex • Broadman’s areas 6 and 8 • Help coordinate and plan complex sequences of movement. • Receives information from posterior and prefrontal association areas 10 Psyc 372 – Physiological Psychology Tertiary Motor Area • Broadman’s Areas 9, 10 11, 45, 46, 47 • More planning and thinking of movement • 45, 46, 47 Involved with speech 11 Psyc 372 – Physiological Psychology Cortex Motor Areas Thalamus BG Cerebellum Brain Stem Spinal Cord Muscle Contraction Movement Sensory ReceptorsFeedback Loop Cortex Motor Areas 12 Psyc 372 – Physiological Psychology Descending Motor Pathways • Axons from Area 4 descend to the spinal cord via two groups • Lateral Group • Ventromedial Group
