Fasciculus gracilis

Information about Fasciculus gracilis

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Fasciculus cuneatus is 3a, in blue at upper right.
Diagram of the principal fasciculi of the spinal cord.
Latinf. gracilis medullae spinalis
subject #185 762
Dorlands/Elsevier f_03/12355926
The fasciculus gracilis (tract of Goll) is wedge-shaped on transverse section, and lies next the posterior median septum, its base being at the surface of the medulla spinalis, and its apex directed toward the posterior gray commissure.

It increases in size from below upward, and consists of long thin fibers which are derived from the posterior nerve roots, and ascend as far as the medulla oblongata, where they end in the nucleus gracilis. It brings in sensory impulses from lower body.

The tract of Goll was named after Swiss neuroanatomist Friedrich Goll (1829–1903).

Additional images


Decussation of pyramids.

Superficial dissection of brain-stem. Lateral view.

Superior terminations of the posterior fasciculi of the medulla spinalis.

The sensory tract.

Upper part of medulla spinalis and hind- and mid-brains; posterior aspect, exposed in situ.


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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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Anatomy of torso (primarily): the spinal cord
Spinal nerveDorsal (Root, Ganglion, Ramus) • Ventral (Root, Ramus) • Sympathetic trunk • rami communicantes (Gray, White)
Gray matter/Rexed laminaePosterior horn (Column of Clarke, Substantia gelatinosa of Rolando, Nucleus proprius) • Lateral horn • Anterior horn • Central canal/Substantia gelatinosa centralis
White matter: somatic/ascending (blue)
White matter: motor/descending (red)
LayersEpidural space • Dura mater • Subdural space • Arachnoid mater • Subarachnoid space • Pia mater
Other structuresDenticulate ligaments • Conus medullaris • Cauda equina • Filum terminale • Cervical enlargement • Lumbar enlargement • Anterior median fissure
Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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Posterior median sulcus can refer to:
  • posterior median sulcus of spinal cord
  • posterior median sulcus of medulla oblongata

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spinal chord is a thin, tubular bundle of nerves that is an extension of the central nervous system from the brain and is enclosed in and protected by the bony vertebral column.
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In anatomy and neurology, the dorsal root (or posterior root) is the afferent sensory root of a spinal nerve.

At the distal end of the dorsal root is the dorsal root ganglion, which contains the neuron cell bodies of the nerve fibres conveyed by the root.
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The medulla oblongata is the lower portion of the brainstem.

Location

By anatomical terms of location, it is rostral to the spinal cord and caudal to the pons, which is in turn ventral to the cerebellum.
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Located in the medulla oblongata, the gracile nucleus is one of the dorsal column nuclei that participates in the sensation of fine touch and proprioception. It contains second-order neurons of the dorsal column-medial lemniscus system which receive inputs from sensory neurons of
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Neuroanatomy is the branch of anatomy that studies the anatomical organization of the nervous system. In vertebrate animals, the routes that the myriad nerves take from the brain to the rest of the body (or "periphery"), and the internal structure of the brain in particular, are
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eMedicine is an online clinical medical knowledge base that was founded in 1996 by Scott Plantz and Richard Lavely, two medical doctors. It was sold to WebMD in January 2006.
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University of Wisconsin–Madison (also known as UW–Madison, Madison, Wisconsin, University of Wisconsin, or UW) is a highly selective public research university located in Madison, Wisconsin, USA.
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Public domain comprises the body of knowledge and innovation (especially creative works such as writing, art, music, and inventions) in relation to which no person or other legal entity can establish or maintain proprietary interests within a particular legal jurisdiction.
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Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened) is an English-language human anatomy textbook widely regarded as a classic work on the subject.
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Torso is an anatomical term for the central part of the many animal bodies (including that of the human) from which extend the neck and limbs. It is sometimes referred to as the trunk. The torso includes the thorax and abdomen.
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spinal chord is a thin, tubular bundle of nerves that is an extension of the central nervous system from the brain and is enclosed in and protected by the bony vertebral column.
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The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. The spinal nerve is the bit that passes out of the vertebrae through the intervertebral foramen.
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In anatomy and neurology, the dorsal root (or posterior root) is the afferent sensory root of a spinal nerve.

At the distal end of the dorsal root is the dorsal root ganglion, which contains the neuron cell bodies of the nerve fibres conveyed by the root.
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In anatomy and neurology, the dorsal root ganglion (or spinal ganglion) is a nodule on a dorsal root that contains cell bodies of neurons in afferent spinal nerves.

The axons of dorsal root ganglion neurons are known as afferents.
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The posterior (or dorsal) branches (or divisions) of the spinal nerves are as a rule smaller than the anterior divisions.

They are directed backward, and, with the exceptions of those of the first cervical, the fourth and fifth sacral, and the coccygeal, divide into medial
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In anatomy and neurology, the ventral root (or anterior root) is the efferent motor root of a spinal nerve.

At its distal end, the ventral root joins with the dorsal root to form a mixed spinal nerve.
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The ventral ramus (anterior ramus, anterior branch, anterior divisions of the spinal nerves) supply the antero-lateral parts of the trunk, and the limbs; they are for the most part larger than the posterior divisions.
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The sympathetic trunk (sympathetic chain, gangliated cord) is a bundle of nerve fibers that runs from the base of the skull to the coccyx. There are two sympathetic trunks in the body, a right one and a left one.
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Rami communicans (plural rami communicantes) is the term used for a nerve which connects two other nervers.

When used without further definition, it almost always refers to a communicating branch between a spinal nerve and the sympathetic trunk.
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Each spinal nerve receives a branch, gray ramus communicans, from the adjacent ganglion of the sympathetic trunk.

They contain unmyelinated postganglionic sympathetic fibers.
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The thoracic, and the first and second lumbar nerves each contribute a branch, white ramus communicans to the adjoining sympathetic ganglion.

They contain myelinated preganglionic sympathetic fibers (GVE and GVA).
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"Gray Matter"
Author Stephen King
Language English
Genre(s) Horror, science fiction
Published in Cavalier (1st release) ,
Night Shift,
Arbour House Necropolis
Publication type Magazine
Media type Print
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Rexed laminae comprise a system of ten layers of grey matter (I-X), identified in the early 1950s by Bror Rexed to label portions of the spinal cord. [1][2]
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The posterior horn (posterior column, posterior cornu, dorsal horn, spinal dorsal horn) of the spinal cord is the dorsal (more towards the back) grey matter of the spinal cord.
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The dorsal nucleus (column of Clarke, Clarke's columns, posterior thoracic nucleus) occupies the medial part of the base of the posterior column, and appears on the transverse section as a well-defined oval area.
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substantia gelatinosa of Rolando (or gelatinous substance of posterior horn of spinal cord), which contains both neuroglia cells, and small nerve cells. The gelatinous appearance is due to a very low concentration of myelinated fibers.

It is named for Luigi Rolando.
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The Nucleus proprius is a layer of the spinal cord adjacent to the substantia gelatinosa. It receives non-noxious inputs from the periphery. Cells in this nucleus project to deeper laminae of the spinal cord, to the posterior column nuclei, and to other supraspinal relay centers
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