Explain the effect on locomotion/body movement when cerebral cortex is damaged or injured

Focal lesions in the Supplementary Motor Area (SMA) result in motor apraxia (the inability to perform purposeful movement even though no paralysis exists. Apraxia can also occur with lesions in premotor/parietal areas. Agnosia is cased by a defect in the ability to recognise sensory stmuli without a defecr in the sense (occurs due to lesions in parietal lobes). Astereognosia involves an inability to recognize objects by touch. Parietal lesions can also lead to visual neglect (not recognising objects in visual field) or denial (viewing the body’s own limbs as belonging to someone else).