what is meant by the second layer mentioned?
Purkinje cells are among the most distinctive neurons in the brain, and one of the earlie.st types to be recognized
Cerebellum
Purkinje cells are among the most distinctive neurons in the brain, and one of the earliest types to be recognized
what is the largest part of the mature brain UNANSWERABLE where exactly is the cerebellum located? In the posterior cranial fossa. what is this part of the brain made up of? It consists of a tightly folded layer of cortex, with white matter underneath and a fluid-filled ventricle at the base. from where does it get its blood supply? The superior cerebellar artery, the anterior inferior cerebellar artery, and the posterior inferior cerebellar artery. what is the clinical significance of the first one? It is the cause of trigeminal neuralgia. what is this mentioned problem all about? It is a long-term pain disorder that affects the trigeminal nerve. what are the symptoms it causes? This disorder is characterized by episodes of severe facial pain along the trigeminal nerve divisions. how can it be treated? Microvascular decompression provides freedom from pain in about 75% of patients presenting with drug-resistant trigeminal neuralgia. how is the first one performed? It is a very complicated brain surgery. what are the functions of that part of the brain which was discussed earlier? Problems with motor control, on the same side of the body as the damaged part of the cerebellum. what happens if this part is damaged? You continue to be able to generate motor activity but lose precision, producing erratic, uncoordinated, or incorrectly timed movements. what are the different layers of this part? Molecular layer, Purkinje layer and Granular layer. what is meant by the first layer mentioned? It is the top, outermost layer of the cerebellar cortex.
wiki:11556513
Cerebellum [SEP] Purkinje layer
Purkinje cells are among the most distinctive neurons in the brain, and one of the earliest types to be recognized—they were first described by the Czech anatomist Jan Evangelista Purkyně in 1837. They are distinguished by the shape of their dendritic tree: The dendrites branch very profusely, but are severely flattened in a plane perpendicular to the cerebellar folds. Thus, the dendrites of a Purkinje cell form a dense planar net, through which parallel fibers pass at right angles. The dendrites are covered with dendritic spines, each of which receives synaptic input from a parallel fiber. Purkinje cells receive more synaptic inputs than any other type of cell in the brain—estimates of the number of spines on a single human Purkinje cell run as high as 200,000.