opisthion


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o·pis·thi·on

(ō-pis'thē-on),
The middle point on the posterior margin of the foramen magnum, opposite the basion.
[G. opisthios, posterior]
Farlex Partner Medical Dictionary © Farlex 2012

o·pis·thi·on

(ō-pis'thē-on) [TA]
The middle point on the posterior margin of the foramen magnum, opposite the basion.
[G. opisthios, posterior]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

o·pis·thi·on

(ō-pis'thē-on) [TA]
The middle point on the posterior margin of the foramen magnum, opposite the basion.
[G. opisthios, posterior]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
The plane of the foramen magnum (gray line) is defined by the interconnection of the opisthion with the basion points of the skull.
Opisthion (Op): The mid-point on the posterior margin of the foramen magnum is termed the opisthion.
During neck strength measurement, participants sat in an incline bench press chair with its back positioned vertically and participants positioned their head/neck in a neutral posture so that an imaginary line between and nasion and opisthion was horizontal (Strimpakos et al., 2004; Ylinen et al., 1999).
These include the opisthion (the dorsal border of the foramen magnum), basion (the ventral border of the foramen magnum), clivus, hard palate, atlas, pedicle of axis, and tip of the odontoid process.
Anteroposterior diameter of foramen magnum--maximum internal length of the foramen magnum along the midsagittal plane, from opisthion to basion (25).