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Topic: Medial lemniscus

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Medial longitudinal fasciculus

Trigeminal nerve

Medulla oblongata

Cuneate nucleus

Fourth ventricle

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	IX. Neurology. 4b. The Mid-brain or Mesencephalon. Gray, Henry. 1918. Anatomy of the Human Body.
		Thicker medially than laterally, it reaches from the oculomotor sulcus to the lateral sulcus, and extends from the upper surface of the pons to the subthalamic region; its medial part is traversed by the fibers of the oculomotor nerve as these stream forward to reach the oculomotor sulcus.
		The principal gray masses of the tegmentum are the red nucleus and the interpeduncular ganglion; of its fibers the chief longitudinal tracts are the superior peduncle, the medial longitudinal fasciculus, and the lemniscus.
		The medial lemniscus may be considered as the upward continuation of the posterior funiculus of the spinal cord and to convey conscious impulses of muscle sense and tactile discrimination.
	www.bartleby.com /107/188.html (3293 words)

	[No title]
		In the medulla, the medial lemniscus is a column of axons ventral to the hypoglossal nucleus and dorsal to the pyramid.
		Recall that the medial surface of the hemisphere is supplied by branches of the anterior cerebral artery (#6061) and the lateral surface by branches of the middle cerebral artery (#8508, #9812).
		The medial lemniscus is the compact bundle that extends from the pons to the thalamus.
	library.med.utah.edu /kw/hyperbrain/syllabus/syllabus5.html (2014 words)

	medial- FREE medial Information \| Encyclopedia.com: Facts, Pictures, Information!
		Behavioral effects of stimulation of the medial amygdala in the male rat are modified by prior sexual experience.
		An unusual medial ostium of a concha bullosa of the middle turbinate.
		The examiner announces the latest research on the medial effects of the most abused drugs in America: Dr. John Brick discusses his peer-reviewed handbook of the medical consequences of alcohol and drug abuse.
	www.encyclopedia.com /SearchResults.aspx?Q=medial (1613 words)

	lab6
		Medial Vestibulospinal tract - arises from the medial (mainly) and inferior vestibular nuclei.
		Note that the central tegmental tract is medial and somewhat dorsal and the chief sensory nucleus of the trigeminal nerve is dorsolateral.
		Medial Geniculate Body (Upper Midbrain) - this cluster of cells is included in the lateral mass of the thalamus and relays ascending auditory information from the inferior colliculus.
	hippocrates.ouhsc.edu /showcase/Neurosciences/lab6.html (1698 words)

	lemniscus- FREE lemniscus Information \| Encyclopedia.com: Facts, Pictures, Information!
		A band of ascending sensory nerve fibres connected to the thalamus, including the lateral lemniscus, medial lemniscus and trigeminal lemniscus, the whole lemniscus being referred to nontechnically as the fillet.
		Either of the two bands of nerve fibres in the lemniscus connecting the cochlear nuclei to the inferior colliculi and the thalamus on each side of the brain, involved in the processing of auditory signals.
		The entire medial lemniscus and parts of the spinal lemniscus were included in the area of hemorrhage on...
	www.encyclopedia.com /SearchResults.aspx?Q=lemniscus (1127 words)

	Medial lemniscus - Wikipedia, the free encyclopedia
		The medial lemniscus, also known as Reil's band or Reil's ribbon, is a pathway in the brainstem that carries sensory information from the gracile and cuneate nuclei to the thalamus.
		It is part of the posterior column-medial lemniscus system, which transmits touch, as well as the pathway for proprioception.
		Fibres from the head are medial, fibres from the leg are lateral.
	en.wikipedia.org /wiki/Medial_lemniscus (287 words)

	Somatosensory I
		medial cuneate and gracile nuclei are paired structures in the closed medulla and caudal part of the open medulla.
		The secondary fibers from the dorsal column nuclei cross to the contralateral side and ascend to the thalamusas the medial lemniscus.
		medial lemniscus occupies a vertical strip close to the midline, medial to the inferior olivary nucleus and, dorsal to the pyramidal tract (page 142, Woolsey).
	thalamus.wustl.edu /Neural_Systems_03/sys_web_2003/2003/20030226Lab.htm (2845 words)

	Posterior column-medial lemniscus pathway - Wikipedia, the free encyclopedia
		The posterior column-medial lemniscus pathway is the sensory pathway responsible for transmitting fine touch and conscious proprioceptive information from the body to the cerebral cortex.
		At the medulla, the medial lemniscus is orientated perpendicular to the way the fibres travelled in the posterior columns.
		The medial lemniscus rotates 90 degrees at the pons.
	en.wikipedia.org /wiki/Posterior_column-medial_lemniscus_pathway (544 words)

	Neuroscience Online (ii,4,2)
		It is important to keep in mind that within the medial lemniscal pathway, the afferents carrying discriminative touch information are kept separate from those carrying proprioceptive information up to the level of the cerebral cortex.
		ascend the brain stem in the medial lemniscus to the diencephalon.
		Afferent neurons in the medial lemniscal pathway activated by touching the left foot with a wisp of cotton.
	nba.uth.tmc.edu /neuroscience/s2/ii4-2.html (1026 words)

	[No title]
		NA 403.Inferior colliculus and brachiumLocated on the dorsal surface of the midbrian, caudal to the superior colliculus.
		Virtually all the ascending fibers in the lateral lemniscus synapse (from the ipsi- & contralateral superior olivary nuclei and nuclei of the lateral lemniscus, and from the contralateral cochlear nuclei) in the nuclei of the inferior colliculus.
		Uses vasopressin and oxytocin and projects to the medial forebrain bundle, runs in the dorsolateral tegmentum, and projects to the brainstem parasympathetic nuclei, the spinal sympathetic neurons in the intermediolateral nucleus of the thoracic and lumbar segments, and the spinal parasypathetics neurons in the sacral spinal cord.
	cpmcnet.columbia.edu /student/ssn/05-06/neuro/NA-exam3-terms.doc (4014 words)

	Chapter 6 - Somesthesia - Central Mechanisms
		The fibers of the medial lemniscus, along with those from the trigeminal nuclei and the spinothalamic tract, proceed directly to the ventral part of the thalamus, contralateral to the primary afferent fibers associated with them.
		Notice that the foot is represented on the medial aspect of the hemisphere in the midsagittal sulcus with the leg represented on the medial part of the exposed hemisphere, and the trunk, arm and hand more laterally.
		The dorsal column fibers are branches of the large myelinated fibers of the medial division of the dorsal root.
	www.unmc.edu /Physiology/Mann/mann6.html (11611 words)

	[No title]
		The inferior colliculus is a relay nucleus in the auditory pathway.
		The oculomotor nucleus (C.N. III) is dorsal to the MLF and it lies in the tegmentum of the midbrain at the level of the superior colliculus, not at the level of the inferior colliculus.
		The oculomotor nucleus is motor to external ocular muscles (the superior, medial and inferior recti, levator palpebrae superioris of the eyelid and the inferior oblique) thus the fibers are efferent (GSE) not afferent (GSA).
	www.kumc.edu /research/medicine/pharmacology/CAI/webCAI/anatomy/ua14.wbc (1677 words)

	Medical Neurosciences
		The medial lemniscus is thus a large ascending bundle of heavily myelinated axons (fast conducting) whose cell bodies lie in the contralateral nucleus gracilis and nucleus cuneatus.
		The medial lemniscus passes rostrally through the medulla, pons and midbrain to terminate in the ventral posterolateral (VPL) nucleus of the thalamus.
		For instance, in the medullary segment of the medial lemniscus the body is represented in an upright position, so that the legs are ventral and the arms dorsal.
	www.neuroanatomy.wisc.edu /virtualbrain/BrainStem/04NGNC.html (472 words)

	4-1: Left cerebellar hemisphere and brainstem: lateral view
		The lateral and medial lemnisci are gathered together in a large bundle that passes around the dorsolateral surface of the superior cerebellar peduncle to reach the midbrain tegmentum.
		At the medullary level, the medial lemniscus (which contains the 2nd neuron axons in the pathway for proprioceptive and tactile sensations) is found dorsal to the pyramidal tract and medial to the olivary nucleus.
		The disposition of the medial lemniscus alters in the upper part of the medulla so that, as it enters the pons, it spreads out horizontally (that is, from side to side), as can be seen in the photograph of a transverse section through the lower pons (4-10).
	www.tripdatabase.com /spider.html?itemid=230531 (413 words)

	BASIC CEREBRAL CORTEX FUNCTION OTHER THAN VISION
		Fibers from the medial geniculate nucleus of the thalamus terminate in layer 4 of the primary auditory cortex (Brodmann area 41).
		This wide variety of sensory response is mediated by odorant binding proteins on the cilia of the olfactory cells of the olfactory epithelium.
		The medial lemniscus continues upward, is joined at the pons with fibers containing facial information from the trigeminal nerve, and terminate in the ventral posterior nucleus of the thalamus.
	www.benbest.com /science/anatmind/anatmd6.html (5875 words)

	Medical Neurosciences
		The primary input to both cochlear nuclei is from the auditory portion of C.N. The axons making up this division of C.N. VIII consist of the central processes of neurons that lie in the spiral or cochlear ganglion (lies in the modiolus [bony core] of the cochlea).
		Cell in the inferior colliculus project to the medial geniculate body of the thalamus via the brachium (arm) of the inferior colliculus.
		4.) the lateral lemniscus terminates in the inferior colliculus of the midbrain, while the brachium of the inferior colliculus terminates in the medial geniculate body of the thalamus.
	www.neuroanatomy.wisc.edu /virtualbrain/BrainStem/12Cochlear.html (518 words)

	ICP monitors
		It stays just lateral to the medial lemniscus in the dorsal pons, and behind it in the medulla to reach the ventral posterior nucleus of the thalamus, mainly in VPL (VPM is trigeminothalamic).
		These effects may also be mediated by secretion of enkephalins in the periaqueductal gray, nucleus raphe magnus,and laminae I and II or Rexed.
		• Descending fibers in the vestibulospinal tract and the medial longitudinal fasciculus.
	www.ucsf.edu /nreview/02.1-Anatomy-Brain&SC/SummaryofSystems.html (1648 words)

	Anatomy Atlases: Atlas of Microscopic Anatomy: Section 1 - Cells
		This is a result of the formation of the medial lemniscus, which displaces the medial longitudinal fasciculus to a more dorsal location.
		The medial accessory olive is found along the border of the medial lemniscus.
		This syndrome (also known as medial medullary syndrome) consists of lower motor neuron paralysis of the ipsilateral half of the tongue and contralateral (upper motor neuron) hemiplegia.
	www.anatomyatlases.org /MicroscopicAnatomy/Section17/Plate17330.shtml (522 words)

	Sensory > Anatomy
		By the time the medial lemniscus reaches the rostral pons it has moved laterally and at this point it is in close proximity to the spinothalamic tract as it ascends to the VPL of the thalamus.
		The level of crossing of the axons of the 2nd order neurons is immediate for the ST system and not until the medulla for the DCML system.
		The ST tract is lateral in the cord and lower brainstem while the DCML system is dorsal and medial in the cord and medial in the lower brainstem.
	library.med.utah.edu /neurologicexam/html/sensory_anatomy.html (681 words)

	Medial lemniscus - Psychology Wiki
		The medial lemniscus, also known as Reil's band or Reil's ribbon, is a pathway in the brainstem that carries sensory information from the gracile and cuneate nuclei to the thalamus.
		At the open medulla (further up the brainstem), the medial lemniscus contains axons from the trigeminal nerve (which supplies the head region), as well as the arms and legs.
		Fibres from the head are medial, fibres from the leg are lateral.
	psychology.wikia.com /wiki/Medial_lemniscus (314 words)

	Joint position sense and vibration sense: anatomical organisation and assessment -- Gilman 73 (5): 473 -- Journal of ...
		DC fibres from sacral and lumbar segments terminate in the gracile (G) nucleus and fibres from thoracic and cervical segments terminate in the cuneate (C) nucleus of the medulla.
		Fibres projecting from the G and C nuclei pass across the midline and enter the medial lemniscus, which ascends to the ventral posterior lateral (VPL) nucleus of the thalamus.
		Neurons emanating from the gracile and cuneate nuclei
	jnnp.bmjjournals.com /cgi/content/full/73/5/473 (3776 words)

	Therapy Information Services - Neuroscience
		Immediate dorsal to the medial aspect of the pyramids is the medial lemniscus, which lies on the midline.
		Beneath the floor of the ventricle (in the tegmentum), are CN nuclei for XI, VII motor nucl, and the motor nucleus of V. The sensory nucleus of V ends in the pons, near the origin of the trigeminal n.
		The sup olivary nucl and this nucl of the lateral lemniscus are though to establish reflexes with V and VII, mediating tensor tympani and stapedius reflexes.
	www.therapyedu.com /neuro/chap12.htm (4974 words)

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