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  2. Anatomical plane - Wikipedia

    en.wikipedia.org/wiki/Anatomical_plane

    A transverse plane (also known as axial or horizontal plane) is parallel to the ground; it separates the superior from the inferior, or the head from the feet. The transverse planes identified in Terminologia Anatomica are the transpyloric plane , the subcostal plane , the transumbilical (or umbilical) plane , the supracristal plane , the ...

  3. Contralateral brain - Wikipedia

    en.wikipedia.org/wiki/Contralateral_brain

    The axial twist theory was designed to explain how the pattern of contralateral organization, [10] decussations and chiasmas develops, and why this pattern is so evolutionarily stable, [25] having no known exceptions throughout the 500 million years of vertebrate evolution. According to the theory, the contralateral organization develops as ...

  4. Decussation - Wikipedia

    en.wikipedia.org/wiki/Decussation

    The origin of the contralateral organization, the optic chiasm and the major decussations on the nervous system of vertebrates has been a long standing puzzle to scientists. [2] The visual map theory of Ramón y Cajal has long been popular [ 3 ] [ 4 ] but has been criticized for its logical inconsistence. [ 5 ]

  5. Anatomical terms of location - Wikipedia

    en.wikipedia.org/wiki/Anatomical_terms_of_location

    Axial (from Latin axis 'axle'): around the central axis of the organism or the extremity. Two related terms, "abaxial" and "adaxial", refer to locations away from and toward the central axis of an organism, respectively

  6. Neuroanatomy - Wikipedia

    en.wikipedia.org/wiki/Neuroanatomy

    Pictured here is a cross-section showing the gross anatomy of the human brain. Neuroanatomy is the study of the structure and organization of the nervous system . In contrast to animals with radial symmetry , whose nervous system consists of a distributed network of cells, animals with bilateral symmetry have segregated, defined nervous systems.

  7. Human anatomy - Wikipedia

    en.wikipedia.org/wiki/Human_anatomy

    Gross anatomy (also called topographical anatomy, regional anatomy, or anthropotomy) is the study of anatomical structures that can be seen by the naked eye. [1] Microscopic anatomy is the study of minute anatomical structures assisted with microscopes , which includes histology (the study of the organization of tissues), [ 1 ] and cytology ...

  8. Transverse plane - Wikipedia

    en.wikipedia.org/wiki/Transverse_plane

    The transverse plane (also known as the horizontal plane, axial plane and transaxial plane) is an anatomical plane that divides the body into superior and inferior sections. [1] It is perpendicular to the coronal and sagittal planes.

  9. Optic chiasm - Wikipedia

    en.wikipedia.org/wiki/Optic_chiasm

    In neuroanatomy, the optic chiasm, or optic chiasma (/ ɒ p t ɪ k k aɪ æ z əm /; from Greek χίασμα 'crossing', from Ancient Greek χιάζω 'to mark with an X'), is the part of the brain where the optic nerves cross. It is located at the bottom of the brain immediately inferior to the hypothalamus. [1]