tectumn.

/ˈtɛktəm/

Etymology: Latin, = roof.

Anatomy.

a. More fully tectum mesencephali. The roof of the midbrain, lying dorsal to the cerebral aqueduct.

ΚΠ

1907 J. B. Johnston Nerv. Syst. Vertebr. xvi. 255 It must be remembered always that the tectum opticum is only a part of the tectum mesencephali.

1921 F. Tilney & H. A. Riley Form & Functions Central Nerv. Syst. xxviii. 487 Like other suprasegmental parts of the nervous system, the tectum is capable of great expansion to meet the demands of adaptation.

1979 Sci. Amer. Sept. 82/1 The mesencephalon..in mammals includes two pairs of structures that together form a region of four hills known as the lamina quadrigemina, the tectum mesencephali or simply the tectum.

b. More fully optic tectum (or tectum opticum). That part of the tectum mesencephali concerned with the functioning of the visual system.

ΘΚΠ

the world > life > the body > nervous system > cerebrospinal axis > brain > parts of brain > [noun] > tectum

tectum1907

1907 J. B. Johnston Nerv. Syst. Vertebr. viii. 147 Structure of the tectum opticum.—In the lower fishes the tectum contains a large number of cells of several forms.

1926 Jrnl. Compar. Neurol. 40 217 The optic tectum far surpasses the cortical areas of the reptilian hemispheres.

1982 Sci. Amer. Mar. 104/3 The optic tectum, also known in mammals as the superior colliculus, is one of the major visual centers of the brain.

Derivatives

ˈtectal adj. of or pertaining to the tectum mesencephali or the optic tectum.

ΘΚΠ

the world > life > the body > nervous system > cerebrospinal axis > brain > parts of brain > [adjective] > tectum

tectospinal1916

tectal1926

1926 Jrnl. Compar. Neurol. 40 217 A group of nuclei which serve as way-stations between the tectal areas and other centers.

1974 Sci. Amer. Mar. 38/2 Recording from individual tectal neurons..tells one how the individual retinal ganglion cells that excite them are reacting.

1975 Nature 30 Oct. 738/1 In the vertebrates below mammals, the tectal and subtectal areas are the main centres of termination of sensory pathways.

This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).

单词	tectum
释义	tectumn. /ˈtɛktəm/ Etymology: Latin, = roof. Anatomy. a. More fully tectum mesencephali. The roof of the midbrain, lying dorsal to the cerebral aqueduct. ΚΠ 1907 J. B. Johnston Nerv. Syst. Vertebr. xvi. 255 It must be remembered always that the tectum opticum is only a part of the tectum mesencephali. 1921 F. Tilney & H. A. Riley Form & Functions Central Nerv. Syst. xxviii. 487 Like other suprasegmental parts of the nervous system, the tectum is capable of great expansion to meet the demands of adaptation. 1979 Sci. Amer. Sept. 82/1 The mesencephalon..in mammals includes two pairs of structures that together form a region of four hills known as the lamina quadrigemina, the tectum mesencephali or simply the tectum. b. More fully optic tectum (or tectum opticum). That part of the tectum mesencephali concerned with the functioning of the visual system. ΘΚΠ the world > life > the body > nervous system > cerebrospinal axis > brain > parts of brain > [noun] > tectum tectum1907 1907 J. B. Johnston Nerv. Syst. Vertebr. viii. 147 Structure of the tectum opticum.—In the lower fishes the tectum contains a large number of cells of several forms. 1926 Jrnl. Compar. Neurol. 40 217 The optic tectum far surpasses the cortical areas of the reptilian hemispheres. 1982 Sci. Amer. Mar. 104/3 The optic tectum, also known in mammals as the superior colliculus, is one of the major visual centers of the brain. Derivatives ˈtectal adj. of or pertaining to the tectum mesencephali or the optic tectum. ΘΚΠ the world > life > the body > nervous system > cerebrospinal axis > brain > parts of brain > [adjective] > tectum tectospinal1916 tectal1926 1926 Jrnl. Compar. Neurol. 40 217 A group of nuclei which serve as way-stations between the tectal areas and other centers. 1974 Sci. Amer. Mar. 38/2 Recording from individual tectal neurons..tells one how the individual retinal ganglion cells that excite them are reacting. 1975 Nature 30 Oct. 738/1 In the vertebrates below mammals, the tectal and subtectal areas are the main centres of termination of sensory pathways. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018). < n.1907
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