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.

Jul 26, 2023 · The medial lemniscus is the rostral continuation of the dorsal column. Axons from second-order neurons decussate at the level of the medulla and travel up the brainstem as the medial lemniscus on the contralateral (opposite) side.

Aug 7, 2023 · The medial lemniscus (second-order neuron of DCML) commences at the nucleus gracilis and nucleus cuneatus at the caudal medulla; the arcuate fibers decussate at the caudal medulla and ascend via the medial lemniscus contralaterally in the brainstem until synapsing at the ventral posterolateral nucleus of the thalamus, the point at which the ...

Jan 2, 2018 · Within the medulla oblongata, these fibres decussate (cross to the other side of the CNS). They then travel in the contralateral medial lemniscus to reach the thalamus. Lastly, the third order neurones transmit the sensory signals from the thalamus to the ipsilateral primary sensory cortex of the brain.

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 .

This decussation is a key component of the dorsal column-medial lemniscal (DCML) pathway, which facilitates the transmission of fine touch, vibration, proprioception, and two-point discrimination sensations from the periphery to the brain.

Jul 31, 2020 · In the spinal cord, this pathway travels in the dorsal column, and in the brainstem, it is transmitted through the medial lemniscus hence it is named as dorsal column-medial lemniscus pathway.

Jun 8, 2021 · In the midline of the medulla is the anterior median fissure, which is continuous along the length of the spinal cord. However, it is interrupted temporarily by the decussation of the pyramids (see below). As we move away from the midline, two sulci are visible – the ventrolateral sulcus and the posterolateral sulcus.

Feb 19, 2024 · The medial lemniscus, also known as Reil's band, is an ascending bundle of myelinated axons extending from the gracile and cuneate nuclei in the dorsal medulla up to the contralateral thalamus.

The internal arcuate axons subsequently cross the midline to form another named tract that is elongated dorsoventrally, the medial lemniscus. (The crossing of these fibers is called the decussation, or crossing, of the medial lemniscus; the word lemniscus means “ribbon.”)