oblongata


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oblongata

 [ob″long-gah´tah]
oblong; see medulla oblongata.

me·dul·la ob·lon·ga·'ta

[TA]
the most caudal subdivision of the brainstem, immediately continuous with the spinal cord, extending from the lower border of the decussation of the pyramid to the pons; its anterior (ventral) surface resembles that of the spinal cord except for the bilateral prominence of the inferior olive; the posterior (dorsal) surface of its upper half forms part of the floor of the fourth ventricle. Motor nuclei of the medulla oblongata include the hypoglossal nucleus, the dorsal motor nucleus, inferior salivatory nucleus, and the nucleus ambiguus; sensory nuclei include the nuclei of the posterior column (gracile and cuneate), the cochlear and vestibular nuclei, the middle and caudal portions of the spinal trigeminal nucleus, and the nucleus of the solitary tract.
See also: medulla.
Synonym(s): myelencephalon [TA], oblongata

me·dul·la ob·lon·ga·ta

(mĕ-dŭl'ă ob-long-gā'tă) [TA]
The most caudal subdivision of the brainstem, continuous with the spinal cord, extending from the lower border of the decussation of the pyramid to the pons; its ventral surface resembles that of the spinal cord except for the bilateral prominence of the inferior olive; the dorsal surface of its upper half forms part of the floor of the fourth ventricle. Motor nucleiof the medulla oblongata include the hypoglossal nucleus, the dorsal motor nucleus, inferior salivatory nucleus, and the nucleus ambiguus; sensory nuclei include the nuclei of the posterior column (gracile and cuneate), the cochlear and vestibular nuclei, the mid and caudal portions of the spinal trigeminal nucleus, and the nucleus of the solitary tract.
See also: medulla
Synonym(s): myelencephalon, oblongata.
References in periodicals archive ?
So also transformations of maya give rise to various mental phases, functions and activities, while the real source of mental energy, Atman, is untouched and unchanged or not transformed but is essential for the existence of awareness as (human) consciousness and simultaneously for the awareness of activities of the mind and body as transformations (beings / becomings) of Atman and maya Thus mental energy pulse series reflected in Medha,(can be medulla oblongata or reticular formation?) termed as maya, are virtual (unreal-mithya), but are same in content, form and nature as the real mental-energy presence (Atman) just as reflected light energy is same as light energy from source in content, form and nature.
No muscles act upon the shape and size of the FM; its prime function is to accommodate the passage of structures into and out of the cranial base region particularly the medulla oblongata, which occupies the greatest proportion of the foramina space.
Label plane placement posterior to the medulla oblongata, visible on a sagittal [T.sub.2] weighted anatomical image (green), enabled consistent label plane location between animals, while not interfering with imaging slices (yellow).
Yoshida, "A case of sporadic and transient bradyarrhythmias in a patient with a glioma in the medulla oblongata," Kokyu to Junkan, vol.
Subsequently, she underwent MRI of brain and brainstem, which revealed a posteromedial infarction in the lower part of the medulla oblongata without leptomeningeal enhancement and did not show a significant cerebral oedema (Figure 2).
Cerebellum and its meninges were not affected and medulla oblongata showed sparse small glial nodules.
However, when only cR2 is affected, as suggested by the crossed type of the abnormality hypothesis, it is better to localize the pathology to the brainstem and restrict it to the caudal pons and medulla oblongata rather than the suprasegmental levels.
[18] Reasons for development of bradycardia by pethidine is that it depresses vital centers in the medulla oblongata and stimulates the vagal system.
Due to the location of the baroreceptor regulatory center in the lateral medulla oblongata, patients with Wallenberg's syndrome occasionally have autonomic dysregulation [2].
ICNIRP [18] defines CNS as "the portion of the vertebrate nervous system consisting of the brain and spinal cord, but not including the peripheral nerves" and PNS as "nerves found outside the central nervous system and leading to and from the central nervous system." Taking into account these ICNIRP definitions, ten CNS tissues are included in the children models used in this study, that is, brain gray matter, brain matter, cerebellum, hippocampus, hypothalamus, medulla oblongata, midbrain, pons, spinal cord, and thalamus, whereas all the nerves of the wholebody, including the optical nerves and the spinal nerves (i.e., those nerves connecting the spinal cord with the rest of the body, but not the spinal cord itself) are included in the PNS.
Ltd., Tokyo, Japan) was installed on the left or the right pyramid of the medulla oblongata by inserting it at a position approximately 1.5 mm closer to the head and 0.5 mm toward the outside, and at an insertion angle of approximately 30[degrees] toward the head, with respect to the obex, and a constant current stimulation was provided, respectively [7, 8].
They are widely expressed in the central nervous system (CNS), especially in brainstem respiratory neurons and motor neuron [9, 12], including the pre-Botzinger complex of the medulla oblongata, which is the generator of basic respiratory rhythm [9,11-13].