| Brain: Nucleus ambiguus | | | | Transverse section of medulla oblongata below the middle of the olive. ("Nucleus ambiguus" labeled at center right.) | | | | Nuclei of origin of cranial motor nerves schematically represented; lateral view. (Nucleus ambiguus visible at bottom right.) | | Gray's | subject #187 779 | | NeuroNames | hier-762 | | Dorlands/Elsevier | n_11/12580164 | The nucleus ambiguus (literally "ambiguous nucleus") is a region of histologically disparate cells located just dorsal (posterior) to the inferior olivary nucleus in the lateral portion of the upper (rostral) medulla. This nucleus gives rise to the efferent motor fibers of the vagus nerve (CN X) terminating in the laryngeal and pharyngeal muscles, as well as to the efferent motor fibers of the glossopharyngeal nerve (CN IX) terminating in the stylopharyngeus. Image File history File links Gray695. ...
The term transverse means side-to-side, as opposed to longitudinal, which means front-to-back. In automotive engineering, the term transverse refers to an engine in which the crankshaft is oriented side-to-side relative to the wheels of the vehicle. ...
The medulla oblongata is the lower portion of the brainstem. ...
Image File history File links Gray697. ...
NeuroNames is a system of nomenclature for the brain and related structures. ...
Elseviers logo Elsevier, the worlds largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. ...
A thin section of lung tissue stained with hematoxylin and eosin. ...
Drawing of the structure of cork as it appeared under the microscope to Robert Hook from Micrographia which is the origin of the word cell. Cells in culture, stained for keratin (red) and DNA (green). ...
In anatomy, the dorsum is the upper or back side of an animal, as opposed to the ventrum. ...
The English word POSTERIOR is identical to the original Latin adjective, and has two different uses : as an ADJECTIVE, it indicates that someone or something is behind another, either spatially or chronologically it also became a SUBSTANTIVE, indicating the rear-end, especially of a person, i. ...
In anatomy, the olivary bodies or simply olives (Latin oliva) are a pair of prominent oval structures in the medulla oblongata, the lower portion of the brainstem. ...
The term lateral can refer to: an anatomical definition of direction. ...
In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ...
The medulla oblongata is the lower portion of the brainstem. ...
Efferent nerve fibers carry information away from the brain. ...
The vagus nerve (also called pneumogastric nerve or cranial nerve X) is the tenth of twelve paired cranial nerves, and is the only nerve that starts in the brainstem (within the medulla oblongata) and extends, through the jugular foramen, down below the head, to the abdomen. ...
Cranial nerves are nerves which start directly from the brainstem instead of the spinal cord. ...
The pharynx (plural pharynx), or voicebox, is an organ in the neck of mammals involved in protection of the trachea and sound production. ...
The pharynx (plural: pharynges) is the part of the neck and throat situated immediately posterior to the mouth and nasal cavity, and cranial to the esophagus, larynx, and trachea. ...
The glossopharyngeal nerve is the ninth of twelve cranial nerves. ...
The Stylopharyngeus muscle is a muscle of the human body. ...
The muscles supplied by the vagus (included with this is the cranial part of the accessory nerve), such as levator veli palatini, are also necessary to swallow properly. The vagus also supplies the upper part of the esophagus, and other parts of the pharynx and larynx. The vagus nerve (also called pneumogastric nerve or cranial nerve X) is the tenth of twelve paired cranial nerves, and is the only nerve that starts in the brainstem (within the medulla oblongata) and extends, through the jugular foramen, down below the head, to the abdomen. ...
The accessory nerve is the eleventh of twelve cranial nerves. ...
The Levator veli palatini is a muscle of the human body. ...
The esophagus (also spelled oesophagus/Å“sophagus), or gullet is an organ in vertebrates which consists of a muscular tube through which food passes from the mouth area to the stomach. ...
The pharynx (plural: pharynges) is the part of the neck and throat situated immediately posterior to the mouth and nasal cavity, and cranial to the esophagus, larynx, and trachea. ...
The pharynx (plural pharynx), or voicebox, is an organ in the neck of mammals involved in protection of the trachea and sound production. ...
As well as motor functions, nucleus ambiguus also contains the preganglionic neurons for the heart. The heart and lungs, from an older edition of Grays Anatomy. ...
External links
- Medical Neurosciences discuss the nucleus ambiguus.
- GPnotebook -1664090053
| Rhombencephalon (hindbrain) | | MYELENCEPHALON/MEDULLA: arcuate nucleus of medulla, solitary nucleus, hypoglossal nucleus, nucleus ambiguus, olivary body, inferior olivary nucleus, cuneate nucleus, accessory cuneate nucleus, gracile nucleus, inferior salivatory nucleus, raphe nuclei (obscurus, magnus, pallidus), area postrema, posterior nucleus of vagus nerve GPnotebook is a British medical database for general practitioners (GPs. ...
Wikipedia does not have an article with this exact name. ...
The myelencephalon is a developmental categorization of a portion of the central nervous system. ...
The medulla oblongata is the lower portion of the brainstem. ...
Grays Fig. ...
The solitary nucleus and tract are structures in the brainstem that carry and receive visceral sensation and taste from the facial (VII), glossopharyngeal (IX), vagus (X) cranial nerves, as well as the cranial part of the accessory nerve (XI). ...
The hypoglossal nucleus extends the length of the medulla, and being a motor nucleus, is close to the midline. ...
In anatomy, the olivary bodies or simply olives (Latin oliva and olivae, singular and plural, respectively) are a pair of prominent oval structures in the medulla oblongata, the lower portion of the brainstem. ...
In anatomy, the olivary bodies or simply olives (Latin oliva) are a pair of prominent oval structures in the medulla oblongata, the lower portion of the brainstem. ...
Cuneate nucleus is a wedge-shaped nucleus in the medulla. ...
The accessory cuneate nucleus is located lateral to the cuneate nucleus in the medulla oblongata at the level of the sensory decussation (the crossing fibers of the posterior column/medial lemniscus tract). ...
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. ...
The inferior salivatory nucleus is one of the components of the glossopharyngeal nerve, which stimulates secretion from the parotid gland. ...
The raphe nuclei (Latin for the bit in a fold or seam) is a moderately sized cluster of nuclei found in the brain stem, and releases serotonin to the rest of the brain. ...
The nucleus raphe obscurus, despite the implications of its name, has some very specific functions and connections of afferent and efferent nature. ...
The nucleus raphe magnus, located directly rostral to the raphe obscurus, is afferently stimulated from axons in the spinal cord and cerebellum. ...
The nucleus raphe pallidus receives afferent connections from the periaqueductal gray, the paraventricular hypothalamic nucleus, central nucleus of the amygdala, lateral hypothalamic area, and parvocellular reticular nucleus. ...
The lower end of the ala cinerea is crossed by a narrow translucent ridge, the funiculus separans, and between this funiculus and the clava, is a small tongue-shaped area, the area postrema. ...
The posterior nucleus of vagus nerve (or dorsal motor nucleus of vagus) is a cranial nerve nucleus for the vagus nerve that arises from the floor of the fourth ventricle. ...
METENCEPHALON/CEREBELLUM: cerebellar vermis, flocculus, arbor vitae The metencephalon is a developmental categorization of portions of the central nervous system. ...
Figure 1a: A human brain, with the cerebellum in purple. ...
Part of the structure of animal brains, the cerebellar vermis is a narrow, wormlike structure between the hemispheres of the cerebellum. ...
The flocculus is a small lobe of the cerebellum at the posterior border of the middle cerebellar peduncle anterior to the biventer lobule; it is associated with the nodulus of the vermis; together, these two structures compose the vestibular part of the cerebellum. ...
The arbor vitae (Latin for Tree of Life) is the cerebellar white matter, so called for its branched, tree-like appearance. ...
METENCEPHALON/PONS: pontine tegmentum, superior salivary nucleus, trapezoid body, pontine nuclei (superior olivary nucleus, trigeminal nerve nuclei, abducens nucleus, facial motor nucleus, cochlear nuclei, vestibular nuclei), locus ceruleus, paramedian pontine reticular formation, nucleus centralis superior The metencephalon is a developmental categorization of portions of the central nervous system. ...
Position of the pons in the human brain The pons (sometimes pons Varolii after Costanzo Varolio) is a knob on the brain stem. ...
The pontine tegmentum is a part of the pons of the brain involved in the initiation of REM sleep. ...
The Superior salivary nucleus (or superior salivatory nucleus) of the facial nerve is a visceromotor cranial nerve nucleus located in the pontine tegmentum. ...
The trapezoid body is part of the acoustic pathway. ...
The pontine nuclei are a part of the pons which store the memory of intention during motor activity. ...
// Anatomy The superior olivary nucleus (or superior olive) is a small mass of gray substance situated on the dorsal surface of the lateral part of the trapezoid body. ...
The sensory trigeminal nerve nucleus is the largest of the cranial nerve nuclei, and extends through the whole of the brainstem, midbrain to medulla. ...
The abducens nucleus is the originating nucleus from which the abducens nerve emerges - a cranial nerve nucleus. ...
The facial motor nucleus is a collection of neurons in the brainstem that belong to the facial nerve (cranial nerve VII). ...
The cochlear nuclei consist of: (a) the lateral cochlear nucleus, corresponding to the tuberculum acusticum on the dorso-lateral surface of the inferior peduncle; and (b) the ventral or accessory cochlear nucleus, placed between the two divisions of the nerve, on the ventral aspect of the inferior peduncle. ...
The nuclei of the vestibular nerve. ...
The Locus ceruleus, also spelled locus caeruleus or locus coeruleus (Latin for the blue spot), is a nucleus in the brain stem responsible for physiological responses to stress and panic. ...
The paramedian pontine reticular formation, or PPRF, is a brain region, without clearly defined borders, in the center of the pons. ...
The nucleus centralis superior is composed of polygonal, fusiform and pyriform neurons and exists rostral to the nucleus raphe pontis. ...
FOURTH VENTRICLE: obex, median aperture The fourth ventricle is one of the four connected fluid-filled cavities within the human brain. ...
IrOBEX (or just OBEX) is a communications protocol that facilitates the exchange of binary objects between devices. ...
The Median Aperture of the brain (apertura medialis ventriculi quarte) or Foramen of Magendie is an opening in the hollow nerve tube, connecting the 4th ventricle of the brain with the subarachnoid space The median aperture along with the paired lateral apertures (foramina of Luschka) are the primary routes for...
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