ANAT 312 Lecture Notes - Lecture 3: Posterior Parietal Cortex, Supplementary Motor Area, Corticospinal Tract

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 312
• Professor: Leslie W Mac Kenzie

Document Summary

Starts in the primary motor cortex as well as the premotor cortex. There are also projections from the somatosensory cortex and ba 5 (part of the parietal association cortex). These are project down to the corticospinal tract and convert information involved in voluntary skills in movement (both frontal and parietal circuits exist). Posterior parietal cortical areas are involved in multi sensory integration and motor planning (recall the posterior parietal area integrates the dorsal stream of visual information the spatial cortex). This is the central area for multisensory integration building a picture of where everything is in the world and where you are in the world. Lesions to posterior parietal areas (such as one incurred during a stroke) will lead to unusual problems. A lesion in the right posterior parietal cortex will lead to left hemispatial neglect (also discussed in dr. andrew summaries). Ppc projects contralerally but the right ppc projects bilaterally.