BIOS Instant Notes in Neuroscience (2nd Edition) by Alan Longstaff

By Alan Longstaff

The second one version of Instant Notes in Neuroscience covers neuroanatomy, mobile and molecular neuroscience, structures neuroscience, habit, improvement of the apprehensive procedure, studying, reminiscence, and customary mind issues. It supplies quick and simple entry to the middle of the topic in an inexpensive and manageable-sized textual content.

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CSF and meningeal functions The CSF acts as a sink for metabolites that eventually are dumped into the blood via arachnoid villi or choroid plexuses. Mechanical functions of CSF and meninges are to reduce the weight of the brain in the skull, to resist changes in intracranial pressure due to altered brain blood flow and to cushion the brain during violent movements of the head. Related topic Meninges Organization of the central nervous system (A5) The brain and spinal cord are surrounded by three connective tissue membranes, the meninges (Fig.

When blood flow increases, CSF is squeezed from ventricles into the subarachnoid space around the spinal cord. Here the dura mater is more elastic and stretches to accommodate the rise in volume. Longer-term increases in intracranial pressure can be offset by a rise in CSF flow into the venous sinuses through the arachnoid villi. 3. The meninges support the brain and the CSF reduces the force with which the brain impacts the inside of the cranium when the head moves. Section A – Organization of the nervous system A8 B LOOD – BRAIN BARRIER Key Notes Structure of the blood–brain barrier The blood–brain barrier is formed by capillary endothelial cells, which are coupled by tight junctions.

The reticular system is involved in orchestrating global brain functions such as motivation, arousal, sleep and wakefulness and connects widely with the forebrain. The diencephalon in the adult is differentiated into a dorsal thalamus and a ventral hypothalamus. The thalamus is a collection of over 30 distinct nuclei organized into five groups. All sensory input enters the cerebral cortex by way of the thalamus (ventral or posterior groups) with the exception of smell. Although clearly involved in sensory processes other nuclear groups are massively interconnected with cortical regions concerned with emotion (anterior group) and memory (medial group).

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