Topography Landmarks Skull

Front 1

Glabella

Back 1

smooth prominence between eyebrows; superior to bridge of nose

Front 2

Acanthion

Back 2

midline point at junction of upper lip and nasal septum

Front 3

Mental Point

Back 3

middle of chin; mentum

Front 4

Supraorbital Groove

Back 4

ridge of bone under each eyebrow; place finger on eyebrow and roll up

Front 5

What does the supraorbital groove correspond to?

Back 5

highest level of the facial bone mass and the floor of the cranium

Front 6

Nasion

Back 6

depression at the bridge of the nose; point of junction between the nasal bones and the frontal bones; middle of the frontonasal suture

Front 7

Gonion

Back 7

lower posterior corner or angle on each side of the mandible

Front 8

Vertex

Back 8

most superior portion of the cranium

Front 9

Inion

Back 9

external occipital protuberance; midline on the inferior portion of the occipital bone

Front 10

Outer Canthus

Back 10

the more lateral junction of the upper and lower lids of the eye

Front 11

Inner Canthus

Back 11

the junction of the upper and lower lids of the eye adjacent to the nose

Front 12

Supra-Orbital Margin (SOM)

Back 12

superior margin of the orbit

Front 13

Infra-Orbital Margin (IOM)

Back 13

inferior rim of the orbit

Front 14

Mid-Lateral Oribital Margin

Back 14

lateral portion of the orbital rim; located beneath the outer canthus

Front 15

External Auditory Meatus (EAM)

Back 15

opening of the external ear canal

Front 16

Aurical (Pinna)

Back 16

portion of the ear which is not confined within the head; cartilaginous ear flap

Front 17

Top of Ear Attachment (TEA)

Back 17

the most superior portion of the auricle to the scalp; corresponds to the level of the petrous ridges; used to locate mastoid and inner ear structures