Cranium

Question 1

Scaphocephaly

Answer 1

Hint: “Scapho-” meaning boat

Premature closure of sagittal suture
= long, narrow wedge

Question 2

Microcephaly

Answer 2

Small cranium due to abnormal development of brain. Fontanelles close in infancy. Sutures close in the first year.

Question 3

What is the closing of sutures in the fontanelles from early timing to late?

Answer 3

1-3 months after birth: Posterior and Anteriolateral fontanelles
12 months old: Posteriolateral fontanelle
2 years old: Anterior fontanelle

Question 4

Plagiocephaly

Answer 4

Hint: “Plagio-“ meaning oblique

Premature closure of coronal suture on one side only
= twisted, asymmetrically high tower

Question 5

Trigonocephaly

Answer 5

Hint: “Trigon” meaning triangle

Premature closure of frontal suture
= permanent midline ridging

(Think: triangle forehead shape when superior and directly down on head)

Question 6

Brachycephaly

Answer 6

Hint: “Brachy-“ meaning short

Premature closure of coronal sutures
= high tower

Question 7

What is the closure of the frontal bone suture after birth?

Answer 7

End of 2nd year