Cerebro Spinal Fluid Production and Circulation (Animation)

Animasi ini menjelaskan tentang fungsi cerebrospinal fluid (CSF), tempat produksi CSF, Aliran CSF dari ventrikel sampai ke subarachnoid space, ke central canal medulla spinalis dan akhirnya diabsorbsi kembali ke vena. Animasi ini sangat membantu untuk memahami produksi dan fungsi CSF...

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Posted in animation , blok neuroscience , brain , cerebrospinal fluid , ependymal cell , neuroscience , video

Blood-Brain Barrier Animation

Pada video/animasi ini ditampilkan struktur Blood-Brain Barrier yang terutama disusun oleh tight-junction dari endothel, dan dukung oleh Astrosit. Dijelaskan juga beberapa masalah yang dihadapi jika ingin memasukan obat kedalam jaringan otak. Dan saat ini para ahli sedang mengembangkan metode untuk dapat memasukan obat kedalam jaringan otak. Semoga video ini bisa membantu Anda dalam memahami Blood-Brain...

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Posted in animation , blok neuroscience , blood , blood-barin barrier , brain , neuroscience , video

Degeneration & Regeneration of Nerve Tissue-Histology of Nervous System

Mammalian neurons usually do not divide, and their degeneration represents a permanent loss. Peripheral nerve fibers can regenerate if their perikaryons are not destroyed. In contrast to nerve cells, neuroglia of the central nervous system—and Schwann cells and ganglionic satellite cells of the peripheral nervous system—are able to divide by mitosis. Spaces in the central nervous system left by...

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Choroid Plexus & Cerebrospinal Fluid-Histology of Nervous System

The choroid plexus consists of invaginated folds of pia mater, rich in dilated fenestrated capillaries, that penetrate the interior of the brain ventricles. It is found in the roofs of the third and fourth ventricles and in part in the walls of the lateral ventricles. The choroid plexus is composed of loose connective tissue of the pia mater, covered by a simple cuboidal or low columnar epithelium...

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The Blood-Brain Barrier-Histology of Nervous System

The blood–brain barrier is a functional barrier that prevents the passage of some substances, such as antibiotics and chemical and bacterial toxic matter, from the blood to nerve tissue. The blood–brain barrier results from the reduced permeability that is characteristic of blood capillaries of nerve tissue. Occluding junctions, which provide continuity between the endothelial cells of these capillaries,...

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Meninges-Histology of Nervous System

The skull and the vertebral column protect the central nervous system. It is also encased in membranes of connective tissue called the meninges . Starting with the outermost layer, the meninges are the dura mater, arachnoid, and pia mater. The arachnoid and the pia mater are linked together and are often considered a single membrane called the pia-arachnoid. Dura Mater The dura mater is the external...

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The Ganglia-Histology of Nervous System

Ganglia are ovoid structures containing neuronal cell bodies and glial cells supported by connective tissue. Because they serve as relay stations to transmit nerve impulses, one nerve enters and another exits from each ganglion. The direction of the nerve impulse determines whether the ganglion will be a sensory or an autonomic ganglion. Sensory Ganglia Sensory ganglia receive afferent impulses...

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The Nerves-Histology of Nervous System

In the peripheral nervous system, the nerve fibers are grouped in bundles to form the nerves. Except for a few very thin nerves made up of unmyelinated fibers, nerves have a whitish, homogeneous, glistening appearance because of their myelin and collagen content. Nerves have an external fibrous coat of dense connective tissue called epineurium, which also fills the space between the bundles of nerve...

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Peripheral Nervous System-Histology of Nervous System

The main components of the peripheral nervous system are the nerves, ganglia, and nerve endings. Nerves are bundles of nerve fibers surrounded by connective tissue sheaths. Nerve Fibers Nerve fibers consist of axons enveloped by a special sheath derived from cells of ectodermal origin. Groups of nerve fibers constitute the tracts of the brain, spinal cord, and peripheral nerves. Myelinated Fibers...

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The Central Nervous System-Histology of Nervous System

The central nervous system consists of the cerebrum, cerebellum, and spinal cord. It has almost no connective tissue and is therefore a relatively soft, gel-like organ. When sectioned, the cerebrum, cerebellum, and spinal cord show regions that are white (white matter) and that are gray (gray matter). The differential distribution of myelin in the central nervous system is responsible for these...

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Neuroglial Cells-Histology of Nervous System

Glial cells are 10 times more abundant in the mammalian brain than neurons; they surround both cell bodies and their axonal and dendritic processes that occupy the interneuronal spaces. Nerve tissue has only a very small amount of extracellular matrix, and glial cells furnish a microenvironment suitable for neuronal activity. Oligodendrocytes produce the myelin sheath that provides the...

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SYNAPSES-Histology of Nervous System

The synapse is responsible for transmission of nerve impulses. Synapses are sites of functional contact between neurons or between neurons and other effector cells (eg, muscle and gland cells). The function of the synapse is to convert an electrical signal (impulse) from the presynaptic cell into a chemical signal that acts on the postsynaptic cell. Most synapses transmit information by releasing...

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Ultrastructure of Neuron-Histology of Nervous System

Cell Body The cell body, also called perikaryon, is the part of the neuron that contains the nucleus and surrounding cytoplasm. Most nerve cells have a spherical, unusually large, euchromatic (pale-staining) nucleus with a prominent nucleolus. The chromatin is finely dispersed, reflecting the intense synthetic activity of these cells. The cell body contains a highly developed rough endoplasmic...

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Structure of Neuron –Histology of Nervous System

Nerve cells, or neurons, are responsible for the reception, transmission, and processing of stimuli; the triggering of certain cell activities; and the release of neurotransmitters and other informational molecules. Most neurons consist of three parts: the dendrites, which are multiple elongated processes specialized in receiving stimuli from the environment, sensory epithelial cells, or other neurons;...

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