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The atlas is the topmost vertebra and the axis (the vertebra below it) forms the joint connecting the skull and spine. The atlas and axis are specialized to allow a greater range of motion than normal vertebrae. They are responsible for the nodding and rotation movements of the head.
In mathematics, particularly topology, an atlas is a concept used to describe a manifold. An atlas consists of individual charts that, roughly speaking, describe individual regions of the manifold. In general, the notion of atlas underlies the formal definition of a manifold and related structures such as vector bundles and other fiber bundles.
Atlas image: back_bone13 at the University of Michigan Health System – Axis & Atlas Articulated, Posterior View; Anatomy image: skel/atlas2 at Human Anatomy Lecture (Biology 129), Pennsylvania State University; Anatomy photo:26:os-0110 at the SUNY Downstate Medical Center; Anatomy figure: 02:01-10 at Human Anatomy Online, SUNY Downstate ...
Sagittal view of cingulate region of human brain with a Talairach grid superimposed in accordance with standard locators. Talairach coordinates, also known as Talairach space, is a 3-dimensional coordinate system (known as an 'atlas') of the human brain, which is used to map the location of brain structures independent from individual differences in the size and overall shape of the brain.
The number of vertebrae in a region can vary but overall the number remains the same. In a human spinal column, there are normally 33 vertebrae. [3] The upper 24 pre-sacral vertebrae are articulating and separated from each other by intervertebral discs, and the lower nine are fused in adults, five in the sacrum and four in the coccyx, or tailbone.
The cruciate ligament of the atlas (cruciform ligament) is a cross-shaped (thus the name) ligament in the neck forming part of the atlanto-axial joint. It consists of the transverse ligament of atlas, a superior longitudinal band, and an inferior longitudinal band. The cruciate ligament of the atlas prevents abnormal movement of the atlanto ...
Atlas and the Hesperides by John Singer Sargent (1925).. The etymology of the name Atlas is uncertain. Virgil took pleasure in translating etymologies of Greek names by combining them with adjectives that explained them: for Atlas his adjective is durus, "hard, enduring", [9] which suggested to George Doig that Virgil was aware of the Greek τλῆναι "to endure"; Doig offers the further ...
Farnese Atlas (Museo Archeologico Nazionale, Naples). The Farnese Atlas is a 2nd-century CE Roman marble sculpture of Atlas holding up a celestial globe.Probably a copy of an earlier work of the Hellenistic period, it is the oldest extant statue of Atlas, a Titan of Greek mythology who is represented in earlier Greek vase painting, and the oldest known representation of the celestial sphere ...