Category Archives: Neuroanatomy

Ventricles in the brain

What is a ventricle in the brain? The ventricles of the brain are a communicating network of cavities filled with cerebrospinal fluid (CSF) and located within the brain parenchyma. Which are the ventricles? The ventricular system is composed of 2 …

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Vertebral artery segments and branches

Vertebral artery arises from the first part of Subclavian artery. Vertebral artery is the first and the largest part of Subclavian artery. Divisions of vertebral artery V1 segment – From origin to transverse process of C6 vertebra V2 segment– Runs …

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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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Cranial Nerves and associated ganglia

Four cranial nerves ,CN III, VII, IX, Xcarry parasympathetic fibres as they emerge from brain stem. The Cranial nerves and their associated ganglia are mentioned below. Oculomotor – Ciliary ganglion. Facial – Pterygopalatine and submandibular ganglion. Glossopharyngeal – Otic ganglion …

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Mnemonic for 12 cranial nerves and their types.

We know that there are 12 pairs of cranial nerves which originate from the brain and brainstem. Remembering the names of these cranial nerves is easily mastered but it is difficult to remember their type ie whether they are Sensory …

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Brodman areas of brain and their lesions

Frontal Lobe Primary motor cortex(Ms1)- Area 4, located in precentral gyrus( front of central sulcus) Premotor area- Area 6 and 8 Prefrontal cortex-9,10,11 Frontal eye field- Common area supplied by premotor area and prefrontal cortex. Supplementary motor area(MsII)- On medial …

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Lemniscus

lemniscus¬†: is a bundle of secondary sensory fibers within the brain stem which terminates in specific relay nuclei of the diencephalon There are four Lemnisci Medial lemniscus- Fine touch and pressure. Tactile localization and 2 point discrimination. Lateral lemnicus-Fibres from …

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