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  2. Corpora quadrigemina - Wikipedia

    en.wikipedia.org/wiki/Corpora_quadrigemina

    It consists of groups of nerve cells-grey matter scattered in white matter. It basically connects the forebrain and the hind brain. It has four corpora quadrigemina which are the reflex centres of eye movement and auditory responses. The superior part of corpora quadrigemina are called superior colliculi, and inferior part as inferior colliculi ...

  3. List of regions in the human brain - Wikipedia

    en.wikipedia.org/wiki/List_of_regions_in_the...

    Corpora quadrigemina. Inferior colliculi; Superior colliculi; Pretectum; Tegmentum. Periaqueductal gray; Rostral interstitial nucleus of medial longitudinal fasciculus; Midbrain reticular formation; Dorsal raphe nucleus; Red nucleus; Ventral tegmental area. Parabrachial pigmented nucleus; Paranigral nucleus; Rostromedial tegmental nucleus ...

  4. Midbrain - Wikipedia

    en.wikipedia.org/wiki/Midbrain

    The corpora quadrigemina are four mounds, called colliculi, in two pairs – a superior and an inferior pair, on the surface of the tectum. The superior colliculi process some visual information, aid the decussation of several fibres of the optic nerve (some fibres remain ipsilateral), and are involved with saccadic eye movements .

  5. Giant-cell tumor of bone - Wikipedia

    en.wikipedia.org/wiki/Giant-cell_tumor_of_bone

    High magnification micrograph of giant cells in a giant-cell tumor of bone, H&E stain. The diagnosis of giant-cell tumors is based on biopsy findings. The key histomorphologic feature is, as the name of the entity suggests, (multinucleated) giant cells with up to a hundred nuclei that have prominent nucleoli.

  6. Superior colliculus - Wikipedia

    en.wikipedia.org/wiki/Superior_colliculus

    In mammals, the superior colliculus forms a major component of the midbrain. It is a paired structure and together with the paired inferior colliculi forms the corpora quadrigemina. The superior colliculus is a layered structure, with a pattern that is similar in all mammals. [4]

  7. Human brain - Wikipedia

    en.wikipedia.org/wiki/Human_brain

    Betz cells are the largest cells (by size of cell body) in the nervous system. [40] The adult human brain is estimated to contain 86±8 billion neurons, with a roughly equal number (85±10 billion) of non-neuronal cells. [41] Out of these neurons, 16 billion (19%) are located in the cerebral cortex, and 69 billion (80%) are in the cerebellum ...

  8. Periaqueductal gray - Wikipedia

    en.wikipedia.org/wiki/Periaqueductal_gray

    Stimulation of the periaqueductal gray matter of the midbrain activates enkephalin-releasing neurons that project to the raphe nuclei in the brainstem. 5-HT released from the raphe nuclei descends to the dorsal horn of the spinal cord where it forms excitatory connections with the inhibitory interneurons located in Laminae II (aka the substantia gelatinosa).

  9. Bone tumor - Wikipedia

    en.wikipedia.org/wiki/Bone_tumor

    [1] [4] Cancerous bone tumors usually originate from a cancer in another part of the body such as from lung, breast, thyroid, kidney and prostate. [1] There may be a lump, pain, or neurological signs from pressure. [1] A bone tumor might present with a pathologic fracture. [1] Other symptoms may include fatigue, fever, weight loss, anemia and ...