This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy, Head and Neck, Subject name: Anatomy
Occlusion of the aery supplying the marked area will lead to all EXCEPT: 
Select and explain. 
A. Urinary incontinence, B. Rectal incontinence, C. Apraxia, D. Perianal anesthesia
B: Rectal incontinence
Answer: B: Rectal incontinence 
Explanation: Area marked: Medial aspect primary motor area & Somatosensory area Paracentral lobule Aery supplying: Anterior cerebral aery Medial aspects of the sensory motor homunculus: Contralateral lower limb & pa of pelvis & perineum Coical micturition center (CMC): - Located in the medial aspect of the frontoparietal coex. Apraxia: - Inability to perform motor tasks on command d/o a lesion in the cerebral hemisphere (Parietal lobe). However, rectal incontinence is not affected or controlled by the paracentral lobular. Rectal incontinence is affected by thoracolumbar region and somatic efferent damage.