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A lemniscus (Greek for ribbon or band [1]) is a bundle of secondary sensory fibers in the brainstem. The medial lemniscus and lateral lemniscus terminate in specific relay nuclei of the diencephalon. The trigeminal lemniscus is sometimes considered as the cephalic part of the medial lemniscus. [2] The spinal lemniscus constitutes the ...
The medial lemniscus, also known as Reil's band or Reil's ribbon (for German anatomist Johann Christian Reil), is a large ascending bundle of heavily myelinated axons that decussate in the brainstem, specifically in the medulla oblongata. The medial lemniscus is formed by the crossings of the internal arcuate fibers.
The lateral lemniscus is a tract of axons in the brainstem that carries information about sound from the cochlear nucleus to various brainstem nuclei and ultimately the contralateral inferior colliculus of the midbrain. Three distinct, primarily inhibitory, cellular groups are located interspersed within these fibers, and are thus named the ...
Lemniscus (in blue) with a’ the medial lemniscus and a" the lateral lemniscus. b. Medial longitudinal fasciculus. c. Raphe. d. Temporopontine fibers. e. Portion of medial lemniscus, which runs to the lentiform nucleus and insula. f. Cerebrospinal fibers. g. Frontopontine fibers.
Upon decussation (crossing over) from one side of the medulla to the other, also known as the sensory decussation, they are then called the medial lemniscus. The internal arcuate fibers are part of the second-order neurons of the posterior column-medial lemniscus system , and are important for relaying the sensation of fine touch and ...
Goss was the esteemed editor of the 25th edition of the seminal classic Gray’s Anatomy. Internationally lauded as the authority on all things anatomical, Gray’s Anatomy had been considered essential for any would-be physician to own since it was first published in London in 1858. It was written by Dr. Henry Gray and illustrated by Henry ...
These fibres decussate (cross) to the contralateral (opposite) side, so called the sensory decussation. The ascending bundle after the decussation is called the medial lemniscus. Unlike other ascending tracts of the brain, fibres of the medial lemniscus do not give off collateral branches as they travel along the brainstem. [1]
Dorsal column–medial lemniscus pathway. Gracile fasciculus; Cuneate fasciculus; Medial lemniscus; Spinothalamic tract. Lateral spinothalamic tract; Anterior spinothalamic tract; Spinomesencephalic tract; Spinocerebellar tract; Spino-olivary tract; Spinoreticular tract