Benedikt’s syndrome, all are true except :
Correct Answer: Lesion at the level of the pons
Description: Answer is D (Lesion at the level of the pons): Benedict's syndrome also known as dorsal mid brain syndrome results from a lesion in the midbrain tegmentum / red nucleus. It is not a pontine syndrome. In benedict's syndrome injury to the red nucleus midbrain results in ipsilateral occulomotor palsy and contralateral tremor ,chorea and athetosis. -- Harrison Benedikt's s ndrome / Dorsal midbrain s ndrome The dorsal midbrain syndrome or Benedikt's syndrome results from a lesion in the red nucleus or tempmentum of midbrain. It is caused by occlusion of the paramedian / penetrating branches of the basilar or posterior cerebral aery or both. Signs include Ipsilateral occulomotor paresis / ptosis and dilated pupil (damage to fascicle of 3rd CN including parasympathetic fibres) Contralteral involuntary movement -- tremor , chorea , athetosis ( damage to red nucleus interrupts fibers from opposite cerebellar hemisphere ) Contralateral hemiparesis may be present if lesion extends ventrally (damage to descending coicospinal tract ) Contralateral hemianaesthesia may be present if lesion extends laterally (damge to spinothalamic tract and medial meniscus ) Other Midbrain syndromes in association with injury to fascicle / nucleus of CN Ill: Harrison 17th/ 193 Weber's syndrome (Injury to cerebral peduncle) Nothnagel's syndrome (Injury to superior cerebellar peduncle) Claude's syndrome (Injury to red nucleus + superior cerebellar peduncle) * * 1psilateral occulomotor palsy Contralatral hemiparesis * * 1psilateral occulomotor palsy. Contralatral cerebellar ataxia * * Ipsilateral occulomotor pasly Contralateral cerebellar ataxia tremor, chorea, athetosis (Benedikt's + nothnogel's)
Category:
Medicine
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now