Monthly Archives: June 2011 - Page 2

Basal ganglia and their classification

The basal ganglia is an important part of the brain which program impulses from cerebral cortex and initiates motor activities through cerebellum and corticospinal tracts. Parkinsonism is a disorder in which there is decrease in the dopaminergic neurons in the …

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Lateral medullary syndrome

Also known as Wallenberg syndrome. Vertebral artery is the most commonly involved artery (V4 segment) or Posterior Inferior cerebellar artery(PICA) Right sided lateral medullary lesion Loss of pain and temperature in right side of face and left side of body. …

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Features of Petit mal seizures

The word Petit mal conveys the meaning: Petit means Petty/small and Mal means an mproper order, unpleasant etc. So Petit mal should be a Small out of order situation(lasting less than 15 seconds typically) Petit mal seizures are also called …

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Midbrain and pontine syndromes

Midbrain Syndromes Weber’s syndrome Ipsilateral 3rd Nerve palsy with contralateral hemiplegia Nothnagels Syndrome Due to superior cerebellar peduncle injury. Ipsilateral 3rd nerve palsy with Contralateral cerebellar ataxia Benedicts Syndrome Due to involvement of red nucleus Ipsilateral 3rd nerve palsy with …

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Pain sensitive and pain insensitive intracranial structures.

Pain sensitive Cranial venous sinuses with afferent veins Arteries at base of brain and arteries of dura eg:Middle meningeal artery Dura around venous sinuses and vessels Falx cerebri Pain Insensitive Brain parenchyma Ependyma Choroid plexus Piamater Arachnoid Dura over convexities …

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Urogenital diaphragm

Urogenital diaphragm is a triangular musculo fascial diaphragm situated in the anterior part of perineum filling the gap of the pubic arch. Components of urogenital diaphragm Deep transverse perinei muscles Sphincter urethrae Superior fascia of urogenital diaphragm Inferior fascia of …

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Anatomical snuffbox,boundaries and contents

Anatomical snuffbox is a triangular depression on the lateral aspect of wrist distal to the radial styloid, it becomes prominent when the thumb is fully extended. Boundaries Lateral/Anterior wall Abductor pollicis longus Extensor pollicis brevis Medial/Posterior wall Extensor pollicis longus …

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