General Boen feature-Depressions (terminology continued)

Question 1

Fossa

Answer 1

• a depressed area; usually broad and shallow. The olecranon fossa is located on the posterior surface of the distal humerus, where it receives the proximal ulna during full extension of the arm.

Question 2

Fovea

Answer 2

• a pit-like, depressed area; usually smaller than a fossa. The anterior fovea of an unworn molar is seen on occlusal view.

Question 3

Groove

Answer 3

• a long pit or furrow. The intertubercular groove passes between two tubercles on the humerus.

Question 4

Sulcus

Answer 4

• a long, wide groove. A strong supratoral sulcus is present on the African appe crania but is weak or absent on Australopithicus crania.

Question 5

Fontanelle

Answer 5

• a space between cranial bone of an infant. The soft spot atop a baby’s head indicates the presence of a fontanelle.

Question 6

Suture

Answer 6

• where adjacent bones of the skull meet (articulate). The lambdoidal suture is between occipital and parietal bones.

Question 7

Foramen

Answer 7

• an opening through a bone, usually a passage for blood vessels and nerves. the mental foramen is an opening on the lateral surface of the mandible .

Question 8

Canal

Answer 8

• a tunnel-like, extended formen. The carotid canal is found at the base of the skull.

Question 9

Meatus

Answer 9

• a short canal. The external auditory meatus is the canal that connects to the middle and outer ear.

Question 10

Sinus

Answer 10

• a cavity within a cranial bone. the frontal sinus is well developed in some early hominid crania.

Question 11

Alveoluse

Answer 11

• a tooth socket. The canine alveolus in the mandible is deeper than the incisor alveolus.