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Encyclopedia > Rhombencephalon
Brain: Rhombencephalon
Diagram depicting the main subdivisions of the embryonic vertebrate brain. These regions will later differentiate into forebrain, midbrain and hindbrain structures.
Superficial dissection of brain-stem. Lateral view.
Gray's subject #187 767
NeuroNames hier-531
MeSH Rhombencephalon
Dorlands/Elsevier r_12/12709581

The rhombencephalon (or hindbrain) is a developmental categorization of portions of the central nervous system in vertebrates. Image File history File links This is a lossless scalable vector image. ... In the anatomy of vertebrates, the prosencephalon is a part of encephalon, or brain. ... In biological anatomy, the mesencephalon (or midbrain) is the middle of three vesicles that arise from the neural tube that forms the brain of developing animals. ... Hindbrain has been used to describe several structures found in the brains of vertebrates. ... Image File history File links Download high resolution version (413x800, 140 KB) Summary Licensing File links The following pages link to this file: Brain stem Wikipedia:Grays Anatomy images with missing articles 14 Rhombencephalon List of images in Grays Anatomy: IX. Neurology ... The brain stem is the lower part of the brain, adjoining and structurally continuous with the spinal cord. ... NeuroNames is a system of nomenclature for the brain and related structures. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Elseviers logo. ... Morphogenesis (from the Greek morphê shape and genesis creation) is one of three fundamental aspects of developmental biology along with the control of cell growth and cellular differentiation. ... A diagram showing the CNS: 1. ... Typical classes Petromyzontidae (lampreys) Placodermi - extinct Chondrichthyes (cartilaginous fish) Acanthodii - extinct Actinopterygii (ray-finned fish) Actinistia (coelacanths) Dipnoi (lungfish) Amphibia (amphibians) Reptilia (reptiles) Aves (birds) Mammalia (mammals) Vertebrata is a subphylum of chordates, specifically, those with backbones or spinal columns. ...


The rhombencephalon can be subdivided in a variable number of transversal swellings called rhombomeres. In the human embryo we can distinguish eight rhombomeres, from caudal to rostral: Rh7-Rh1 and the isthmus (the most rostral rhombomere). In the vertebrate embryo, a rhombomere is a segment of the developing rhombencephalon. ... In anatomy, isthmus refers to a constriction between organs. ... In sciences dealing with the anatomy of animals, precise anatomical terms of location are necessary for a variety of reasons. ...


A rare disease of the rhomencephalon, "rhombencephalosynapsis" is characterized by a missing vermis resulting in a fused cerebellum. Patients generally present with cerebellar ataxia. Figure 1a: A human brain, with the cerebellum in purple. ...


Myelencephalon

Rhombomeres Rh7-Rh4 form the myelencephalon. The myelencephalon is a developmental categorization of a portion of the central nervous system. ...


The myelencephalon forms the medulla oblongata in the adult brain; it contains: The medulla oblongata is the lower portion of the brainstem. ...

The fourth ventricle is one of the four connected fluid-filled cavities within the human brain. ... The glossopharyngeal nerve is the ninth of twelve cranial nerves. ... 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. ... In anatomy, the accessory nerve is a nerve that controls specific muscles of the neck. ... The hypoglossal nerve is the twelfth cranial nerve. ... The vestibulocochlear nerve (also known as the auditory or acoustic nerve) is the eighth of twelve cranial nerves, and is responsible for transmitting sound and equilibrium (balance) information from the inner ear to the brain. ...

Metencephalon

Rhombomeres Rh3-Rh1 form the metencephalon. The metencephalon is a developmental categorization of portions of the central nervous system. ...


The metencephalon is composed of the pons and the cerebellum; it contains: Position of the pons in the human brain The pons (sometimes pons Varolii after Costanzo Varolio) is a knob on the brain stem. ... The cerebellum (Latin: little brain) is a region of the brain that plays an important role in the integration of sensory perception and motor output. ...

The trigeminal nerve is the fifth (V) cranial nerve, and carries sensory information from most of the face, as well as motor supply to the muscles of mastication (the muscles enabling chewing), tensor tympani (in the middle ear), and other muscles in the floor of the mouth, such as the... The sixth of twelve cranial nerves, the abducens nerve is a motor nerve that innervates the lateral rectus muscle and therefore controls each eyes ability to abduct (move away from the midline). ... The facial nerve is the seventh (VII) of twelve paired cranial nerves. ... The vestibulocochlear nerve (also known as the auditory or acoustic nerve) is the eighth of twelve cranial nerves, and is responsible for transmitting sound and equilibrium (balance) information from the inner ear to the brain. ...

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