In this article, we will take an in-depth look at Medial lemniscus and its impact on today's society. Since its appearance, Medial lemniscus has generated endless opinions and debates, becoming a recurring topic of conversation. In recent years, Medial lemniscus has acquired even greater relevance, influencing aspects as diverse as politics, economics, culture and technology. Throughout these pages, we will explore the different angles from which Medial lemniscus can be approached, examining its implications and challenges in the contemporary world. Without a doubt, Medial lemniscus continues to be a cause for reflection and analysis, and this article seeks to shed light on its importance and significance.
Medial lemniscus | |
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Details | |
Identifiers | |
Latin | lemniscus medialis |
NeuroLex ID | birnlex_887 |
TA98 | A14.1.04.111 A14.1.08.672 A14.1.06.207 |
TA2 | 5861 |
FMA | 83675 |
Anatomical terms of neuroanatomy |
In neuroanatomy, 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 (cross) in the brainstem, specifically in the medulla oblongata. The medial lemniscus is formed by the crossings of the internal arcuate fibers. The internal arcuate fibers are composed of axons of nucleus gracilis and nucleus cuneatus. The axons of the nucleus gracilis and nucleus cuneatus in the medial lemniscus have cell bodies that lie contralaterally.
The medial lemniscus is part of the dorsal column–medial lemniscus pathway, which ascends from the skin to the thalamus, which is important for somatosensation from the skin and joints, therefore, lesion of the medial lemnisci causes an impairment of vibratory and touch-pressure sense.
Lemniscus means "ribbon", so named because the medial lemniscus "spirals" or "turns" as it ascends.[citation needed]
After neurons carrying proprioceptive or fine touch information synapse at the gracile and cuneate nuclei, axons from secondary neurons decussate at the level of the medulla and travel up the brainstem as the medial lemniscus on the contralateral (opposite) side. It is part of the posterior column-medial lemniscus pathway, which transmits touch, vibration sense, as well as the pathway for proprioception.[citation needed]
The medial lemniscus carries axons from most of the body and synapses in the ventral posterolateral nucleus of the thalamus, at the level of the mamillary bodies. Sensory axons transmitting information from the head and neck via the trigeminal nerve synapse at the ventral posteromedial nucleus of the thalamus.