Color Atlas of Human Anatomy by Werner Kahle, Michael Frotscher

By Werner Kahle, Michael Frotscher

Pocket-sized atlas is a translation of the seventh German variation, c2001, Taschenatlas der Anatomie, Band three: Nervensystem und Sinnesorgane. for college kids. colour drawings are paired with concise textual content. comprises elements of body structure and biochemistry. earlier variation: c1993. Softcover.

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Several axons and dendrites can join to form glomeruluslike complexes in which the different synaptic elements are closely intertwined. They probably affect each other in terms of finetuning (modulating) the transmission of impulses. Each brain division has characteristic forms of synapses. Gray type I and II synapses are predominantly found in the cerebral cortex, glomerulus-like complexes are found in the cerebellar cortex, in the thalamus, and in the spinal cord. Electrical synapses Adjacent cells can communicate through pores (tunnel proteins), called gap junctions.

Together with the apposed membrane of the next neuron, the bouton forms the synapse where excitation is transmitted from one neuron to another. The synapse consists of the presynaptic component (bouton) (AB1) with the presynaptic membrane (BC2), the synaptic cleft (B3), and the postsynaptic component with the postsynaptic membrane (BC4) of the next neuron. The bouton is free of neurofilaments and neurotubules but contains mitochondria and small, mainly clear vesicles (BC5) which are clustered near the presynaptic membrane (active zone).

We distinguish between myelinated, poorly myelinated, and unmyelinated nerve fibers, also referred to as A, B, and C fibers. The myelinated A fibers have an axonal diameter of 3 – 20 µm and a conduction velocity of up to 120 m/s; the poorly myelinated B fibers are up to 3 µm in diameter and have a conduction velocity of up to 15 m/s. Conduction velocity is the slowest in the unmyelinated C fibers (up to 2 m/s); we are dealing here with a continuous spread of excitation. By contrast, conduction in myelinated nerves is saltatory, that is, it takes place in jumps.

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