lateral lemniscus

(redirected from auditory tract)
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lat·er·al lem·nis·cus

[TA]
a bundle of ascending fibers that originate from the cochlear and auditory relay nuclei of the rhombencephalon, enter the trapezoid body, a transverse fiber stratum in which about half their number decussate, and from here turn rostrally along the lateral side of the spinothalamic tract; in the midbrain, it arches superiorly and enters the inferior colliculus in which all of its fibers terminate; the auditory pathway is transsynaptically extended from here by the brachium of the inferior colliculus to the medial geniculate body of the thalamus, from which in turn the auditory radiation leads to the auditory cortex; intercalated in the trapezoid body and along the ascending trajectory of the lemniscus are several cell groups in which part of the fibers synapse.

lateral lemniscus

An axon tract originating in the cochlear nuclei and ascending to synapse in the inferior colliculi; axons from the inferior colliculi ascend to synapse in the medial geniculate nucleus of the thalamus. This lemniscus is a middle link in the circuit carrying auditory information to the auditory cortex (Heschl's gyrus).
See also: lemniscus
References in periodicals archive ?
Multiple focal demyelinating plaques develop throughout the brain in MS Various symptoms, such as double vision, paresthesia, motor weakness, and hearing loss, can occur according to the loci of these plaques In the presence of demyelinated plaques, which can affect the cochlear nerve and possibly more central auditory tracts, these developments may lead to sudden retrocochlear sensorineural hearing loss [2].