anterior horn


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an·te·ri·or horn

[TA]
1. the frontal or anterior division of the lateral ventricle of the brain, extending forward from the Monro interventricular foramen;
See also: anterior column, gray columns.
2. the anterior horn or anterior (ventral) gray column of the spinal cord as appearing in cross section. The anterior horn is composed of the spinal laminae VIII and IX [TA] of Rexed with portions of VII also extending into its geographical boundaries in lumbosacral and cervical levels. The nuclei of the anterior horn are the anterolateral nucleus [TA] or ventrolateral nucleus [TAalt] (nucleus anterolateralis [TA]), anterior nucleus [TA] (nucleus anterior [TA]), anteromedial nucleus [TA] or ventromedial nucleus [TAalt] (nucleus anteromedialis [TA]), posterolateral nucleus [TA] or dorsolateral nucleus [TAalt] (nucleus posterolateralis [TA]), retroposterior lateral nucleus [TA] or retrodorsal lateral nucleus [TAalt] (nucleus retroposterolateralis [TA]), posteromedial nucleus [TA] or dorsomedial nucleus [TAalt] (nucleus posteromedialis [TA]), central nucleus [TA] (nucleus centralis [TA]), and the accessory nucleus and phrenic nucleus (both found in cervical levels only).
See also: anterior column, gray columns.
Synonym(s): cornu anterius [TA], ventral horn
Farlex Partner Medical Dictionary © Farlex 2012

an·te·ri·or horn

(an-tēr'ē-ŏr hōrn) [TA]
1. The anterior or frontal division of the lateral ventricle of the brain, extending forward from Monro interventricular foramen.
See: lateral ventricle
2. The anterior or ventral gray column of the spinal cord as appearing in cross-section.
See also: gray columns
Synonym(s): cornu anterius [TA] , precornu, ventral horn.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

an·te·ri·or horn

(an-tēr'ē-ŏr hōrn) [TA]
1. [TA] Frontal or anterior division of the lateral ventricle of the brain, extending forward from the interventricular (Monro) foramen.
2. Anterior horn or anterior (ventral) gray column of the spinal cord as appearing in cross-section.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
[12,13] At pathologic examination shrinkage, necrosis and gliosis were found in the anterior horns of the spinal cord from C5 to T1, particularly marked at C7 and C8.
(f-o) Transverse sections through the anterior horn of the lumbar spinal cord.
AFP can include clinical syndromes caused by acute dysfunction of the anterior horn cells (e.g., acute flaccid myelitis), peripheral motor nerves or nerve roots (e.g., Guillain-Barre syndrome), neuromuscular junction (e.g., botulism or myasthenic crisis), or muscle (e.g., acute myopathies) (3,4).
Between March 2005 and October 2014, one hundred and seventy cases in 170 patients who underwent arthroscopic meniscectomies for an unstable inferior leaf of the lateral meniscus anterior horn and associated cysts were retrospectively investigated.
Males with pronotum variable but never with anterior horn or swelling; females without clypealfrontal carina, and with pronotum evenly convex ...
The distances between anterior and posterior horns were determined using the internal face of Vernier Calliper which was placed between the apex of the anterior horn and the apex of the posterior horn (Figure 2).
Patients, who are mostly middle-age, develop a progressive myelopathy which at the early stage of the disease often mimics a polyradiculopathy or anterior horn cell disorder.
Acute poliomyelitis is a disease of the anterior horn motor neurons of the spinal cord and brain stem caused by poliovirus.
Normal measurements of the posterior horn of the medial meniscus may vary, but the posterior horn is usually much larger than the anterior horn (the posterior horn usually measures 12 mm to 16 mm in the sagittal plane in an adult), and approximately twice the size of the anterior horn on sagittal magnetic resonance (MR) images.
Indeed, cerebellar cortex inhibits strongly cerebellar nuclei, which themselves stimulate contralateral motor cortex and ipsilateral anterior horn of the spinal cord.
Another experimental study suggests that kyphotic angle leads to flattening of the cord over the deformity thereby causing demyelination of anterior funiculus, neuronal loss and atrophy of anterior horn and decreased vascularity at the ventral side of compressed spinal cord [12].

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