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  2. Midbrain tegmentum - Wikipedia

    en.wikipedia.org/wiki/Midbrain_tegmentum

    Unlike the midbrain tectum (which is a sensory structure located posteriorly), the midbrain tegmentum, which locates anteriorly, is related to a number of motor functions. Within the tegmentum, the red nucleus is in charge of motor coordination (specifically for limb movements) and the periaqueductal gray matter (PAG) contains critical circuits ...

  3. Midbrain - Wikipedia

    en.wikipedia.org/wiki/Midbrain

    The midbrain tegmentum is the portion of the midbrain ventral to the cerebral aqueduct, and is much larger in size than the tectum. It communicates with the cerebellum by the superior cerebellar peduncles , which enter at the caudal end, medially, on the ventral side; the cerebellar peduncles are distinctive at the level of the inferior ...

  4. Tegmentum - Wikipedia

    en.wikipedia.org/wiki/Tegmentum

    The midbrain tegmentum is the part of the midbrain extending from the substantia nigra to the cerebral aqueduct in a horizontal section of the midbrain. Structures included in the midbrain tegmentum include the red nucleus, reticular formation, and substantia nigra. The red nucleus is responsible for controlling basic body and limb movements.

  5. Superior colliculus - Wikipedia

    en.wikipedia.org/wiki/Superior_colliculus

    The deeper layers also contain a population of motor-related neurons, capable of activating eye movements as well as other responses. [6] In other vertebrates the number of layers in the homologous optic tectum varies. [4] The general function of the tectal system is to direct behavioral responses toward specific points in body-centered space.

  6. Brainstem - Wikipedia

    en.wikipedia.org/wiki/Brainstem

    View of the midbrain showing covering tectum and tegmental floor. The midbrain is further subdivided into three parts: tectum, tegmentum, and the ventral tegmental area. The tectum forms the ceiling. The tectum comprises the paired structure of the superior and inferior colliculi and is the dorsal covering of the cerebral aqueduct.

  7. Medial longitudinal fasciculus - Wikipedia

    en.wikipedia.org/wiki/Medial_longitudinal_fasciculus

    The medial longitudinal fasciculus (MLF) is a prominent bundle of nerve fibres which pass within the ventral/anterior portion of periaqueductal gray of the mesencephalon (midbrain). [1] It contains the interstitial nucleus of Cajal, responsible for oculomotor control, head posture, and vertical eye movement. [2]

  8. Pretectal area - Wikipedia

    en.wikipedia.org/wiki/Pretectal_area

    In neuroanatomy, the pretectal area, or pretectum, is a midbrain structure composed of seven nuclei and comprises part of the subcortical visual system.Through reciprocal bilateral projections from the retina, it is involved primarily in mediating behavioral responses to acute changes in ambient light such as the pupillary light reflex, the optokinetic reflex, and temporary changes to the ...

  9. Ventral tegmental area - Wikipedia

    en.wikipedia.org/wiki/Ventral_tegmental_area

    Neurobiologists have often had great difficulty distinguishing the VTA in humans and other primate brains from the substantia nigra (SN) and surrounding nuclei. Originally, the ventral tegmental area was designated as a ‘nucleus’, but over time ‘area’ became the more appropriate term used because of the heterogeneous cytoarchitectonic features of the region and the lack of clear ...

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