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The brachium of superior colliculus (or superior brachium) is a branch that extends laterally from the superior colliculus, and, passing to the thalamus between the pulvinar and the medial geniculate nuclei, is partly continued into an eminence called the lateral geniculate nucleus, and partly into the optic tract.
English: Diagram of the superior colliculus of the human midbrain (shown in dark red) and surrounding regions. The superior colliculus is surrounded by a red ring and transparent red circle to indicate its location.
The nuclei of two pairs of cranial nerves are similarly located at the ventral side of the periaqueductal grey – the pair of oculomotor nuclei (which control the eyelid, and most eye movements) is located at the level of the superior colliculus, [10] while the pair of trochlear nuclei (which helps focus vision on more proximal objects) is ...
Superior olivary complex. Medial superior olive; Lateral superior olive; Medial nucleus of the trapezoid body; Paramedian pontine reticular formation; Parvocellular reticular nucleus; Caudal pontine reticular nucleus; Cerebellar peduncles. Superior cerebellar peduncle; Middle cerebellar peduncle; Inferior cerebellar peduncle
The periaqueductal gray (PAG), also known as the central gray, is a brain region that plays a critical role in autonomic function, motivated behavior and behavioural responses to threatening stimuli. [1] [2] PAG is also the primary control center for descending pain modulation. It has enkephalin-producing cells that suppress pain.
Inferior colliculus, the principal midbrain nucleus of the auditory pathway Superior colliculus , a paired structure that forms a major component of the vertebrate midbrain Collicular arteries , which supply portions of the midbrain
Function. This small artery supplies the superior colliculus, inferior colliculus, and tectum of midbrain. References This page ...
It arises from the superior colliculus of the mesencephalic (midbrain) tectum, and projects to the cervical and upper thoracic spinal cord levels. [2] It mediates reflex turning of the head and upper trunk in the direction of startling sensory stimuli (visual, auditory, or skin). [2] It arises from the deep layers of the superior colliculus.