Which cranial nerves are found in the metencephalon?
The metencephalon is the embryonic part of the hindbrain that differentiates into the pons and the cerebellum. It contains a portion of the fourth ventricle and the trigeminal nerve (CN V), abducens nerve (CN VI), facial nerve (CN VII), and a portion of the vestibulocochlear nerve (CN VIII).
What structures make up metencephalon?
The metencephalon includes the pons and the cerebellum. The myelencephalon (spinal cord-like) includes the open and closed medulla, sensory and motor nuclei, projection of sensory and motor pathways, and some cranial nerve nuclei. The caudal end of the myelencephalon develops into the spinal cord.
Which structures are a part of the metencephalon of the brain?
The metencephalon, the more cranial subdivision of the hindbrain, consists of two main parts: the pons, which is directly continuous with the medulla, and the cerebellum, a phylogenetically newer and ontogenetically later-appearing component of the brain (see Figure 3).
What is the function of the metencephalon?
The metencephalon It is involved in motor control and sensory analysis, acting as the sensory/motor relay center. Cerebellum – The “cauliflower” piece in the back of the brain that is responsible for sensorimotor function (the part that helps regulate posture, balance, and coordination).
What does the metencephalon give rise to?
The mesencephalon gives rise to the midbrain structures, and the metencephalon the pons and cerebellum. The myelencephalon derives in the medulla. The caudal part of the neural tube develops and differentiates into the spinal cord.
Which of the following structures is a part of the rhombencephalon?
The hindbrain is also called the rhombencephalon. It becomes the cerebellum, pons, and medulla.
What does the rhombencephalon give rise to?
The rostral part of the rhombencephalon becomes the metencephalon and gives rise to the adult cerebellum and pons. Finally, the caudal part of the rhombencephalon becomes the myelencephalon and gives rise to the adult medulla.
What does mesencephalon develop into?
What is the pons function?
The pons, while involved in the regulation of functions carried out by the cranial nerves it houses, works together with the medulla oblongata to serve an especially critical role in generating the respiratory rhythm of breathing. …
What is in the rhombencephalon?
hindbrain, also called rhombencephalon, region of the developing vertebrate brain that is composed of the medulla oblongata, the pons, and the cerebellum. The hindbrain coordinates functions that are fundamental to survival, including respiratory rhythm, motor activity, sleep, and wakefulness.
What does the rhombencephalon develop into?
Where does the alar plate develop in the nervous system?
Neurons of alar plate form sensory nuclei of cranial nerves in medulla (V,VIII,IX,X) in medulla. Remaining cells of alar plate migrate ventrolaterally to form olivary nuclei. Develops from ventral part of metencephalon.
Is the metencephalon a part of the cerebellum?
The metencephalon is the embryonic part of the hindbrain. It differentiates into the pons and cerebellum, containing part of the fourth ventricle. The nuclei of the trigeminal nerve (CN V), abducens nerve (CN VI), facial nerve (CN VII), and vestibulocochlear nerve (CN VIII) are in the pons.
How is the pons similar to myelencephalon?
As its name implies, the pons, derived from the basal plate, serves as a bridge that carries tracts of nerve fibers between higher brain centers and the spinal cord. Its fundamental organization remains similar to that of the myelencephalon, with three sets of afferent and efferent nuclei ( Fig. 11.27 ).
Where is the trigeminal nerve located in the metencephalon?
On the ventral surface, the metencephalon consists of the pons, a rounded region of transverse fibers posterior to the cerebral peduncles. On each side, the trigeminal nerve arises laterally from the posterolateral part of the pons.