acoustic radiation

radiation /ra·di·a·tion/ (ra″de-a´shun)

1. divergence from a common center.

2. a structure made up of divergent elements, as one of the fiber tracts in the brain.

3. energy transmitted by waves through space or through some medium; usually referring to electromagnetic radiation, when used without a modifier. By extension, a stream of particles, such as electrons or alpha particles.

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acoustic radiation  a fiber tract arising in the medial geniculate nucleus and passing laterally to terminate in the transverse temporal gyri of the temporal lobe.

radiation of corpus callosum  the fibers of the corpus callosum radiating to all parts of the neopallium.

corpuscular radiations  streams of subatomic particles emitted in nuclear disintegration, such as protons, neutrons, positrons, and deuterons.

electromagnetic radiation  see under wave.

ionizing radiation  corpuscular or electromagnetic radiation capable of producing ionization, directly or indirectly, in its passage through matter.

occipitothalamic radiation , optic radiation a fiber tract starting at the lateral geniculate body, passing through the pars retrolentiformis of the internal capsule, and terminating in the striate area on the medial surface of the occipital lobe, on either side of the calcarine sulcus.

pyramidal radiation  fibers extending from the pyramidal tract to the cortex.

tegmental radiation  fibers radiating laterally from the red nucleus.

thalamic radiations  fibers which reciprocally connect the thalamus and cerebral cortex by way of the internal capsule, usually grouped into four subradiations (peduncles): anterior, central, inferior, and posterior.

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acoustic radiation

n.

The radiation of fibers that pass from the medial geniculate body to the transverse temporal gyri of the cerebral cortex and form part of the sublentiform part of the internal capsule.