What is A patient of RTA presents in emergency with inability to speak. On examination, the patient was moaning with inability to speak but patient was able to understand what he wanted to speak. Which of following marked area of brain is involved in this? and explain in detail?
(b) BRef: Harrison, 18th ed., pg. 3236ANATOMIC LOCALIZATION IN STROKESigns and SymptomsCerebral Hemisphere, Lateral Aspect (Middle Cerebral A.)* Hemiparesis* Hemisensory deficit* Motor aphasia (Broca's) - hesitant speech with word-finding difficulty and preserved comprehension* Sensory aphasia (Wernicke's) - anomia, poor comprehension, jargon speech Unilateral neglect, apraxias* Homonymous hemianopia or quadrantanopia* Gaze preference with eyes deviated toward side of lesionCerebral Hemisphere, Medial Aspect (Anterior Cerebral A.)* Paralysis of foot and leg with or without paresis of arm* Cortical sensory loss over leg* Grasp and sucking reflexes* Urinary incontinence* Gait apraxiaCerebral Hemisphere, Posterior Aspect (Posterior Cerebral A.)* Homonymous hemianopia* Cortical blindness* Memory deficit* Dense sensory loss, spontaneous pain, dysesthesias, choreoathetosisBrainstem, Midbrain (Posterior Cerebral A.)* Third nerve palsy and contralateral hemiplegia* Paralysis/paresis of vertical eye movement* Convergence nystagmus, disorientationBrainstem, Pontomedullary Junction (Basilar A.)* Facial paralysis* Paresis of abduction of eye* Paresis of conjugate gaze* Hemifacial sensory deficit* Homer's syndrome* Diminished pain and thermal sense over half body (with or without face)* AtaxiaBrainstem, Lateral Medulla (Vertebral A.)* Vertigo, nystagmus* Homer's syndrome (miosis, ptosis, decreased sweating)* Ataxia, falling toward side of lesion* Impaired pain and thermal sense over half body with or without facePatient comprehension is intact in this case, but he has difficulty in speech, resulting in development of Broca's aphasia.