| Ingrassia's apophysis | One of a bilateral pair of triangular, pointed plates extending laterally from the anterolateral body of the sphenoid bone. Forming the posteriormost portion of the floor of the anterior cranial fossa, their sharp posterior edge forms the sphenoidal ridge separating anterior and middle cranial fossae. The medial end of the lesser wing attaches to the body by means of two pedicles, thus forming the optic canal. The wing itself forms the superior margin of the supraorbital fissure. Synonym: ala minor ossis sphenoidalis, ala orbitalis, Ingrassia's apophysis, Ingrassia's wing. (05 Mar 2000) |
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| Ingrassia, Giovanni | <person> Italian anatomist, 1510-1580. See: Ingrassia's apophysis, Ingrassia's wing. (05 Mar 2000) |
| Ingrassia's wing | One of a bilateral pair of triangular, pointed plates extending laterally from the anterolateral body of the sphenoid bone. Forming the posteriormost portion of the floor of the anterior cranial fossa, their sharp posterior edge forms the sphenoidal ridge separating anterior and middle cranial fossae. The medial end of the lesser wing attaches to the body by means of two pedicles, thus forming the optic canal. The wing itself forms the superior margin of the supraorbital fissure. Synonym: ala minor ossis sphenoidalis, ala orbitalis, Ingrassia's apophysis, Ingrassia's wing. (05 Mar 2000) |
| apophysis | 1. <anatomy> A marked prominence or process on any part of a bone. 2. <botany> An enlargement at the top of a pedicel or stem, as seen in certain mosses. Origin: NL, fr. Gr. Offshoot, process of a bone, fr. To grow from; from +, to grow. Source: Websters Dictionary (01 Mar 1998) |
| apophysis conchae | The prominence on the cranial surface of the auricle corresponding to the concha. Synonym: eminentia conchae, apophysis conchae. (05 Mar 2000) |
| apophysis helicis | An anteriorly directed spine at the extremity of the crus of the helix of the auricle. Synonym: spina helicis, apophysis helicis. (05 Mar 2000) |
| basilar apophysis | The part of the occipital bone that lies anterior to the foramen magnum and joins with the body of the sphenoid bone. Synonym: pars basilaris ossis occipitalis, basal part of occipital bone, basilar apophysis, basilar process of occipital bone, basilar process, basiocciput. (05 Mar 2000) |
| temporal apophysis | The nipple-like projection of the petrous part of the temporal bone. Synonym: processus mastoideus, mastoid bone, temporal apophysis. (05 Mar 2000) |
| lenticular apophysis | A knob at the tip of the long limb of the incus which articulates with the stapes. Synonym: processus lenticularis incudis, lenticular apophysis, lenticular bone, orbicular bone, orbicular process, orbiculare, os orbiculare, os sylvii. (05 Mar 2000) |
| apophysis of Ingrassia |
Smaller wing of the sphenoid bone.
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