Skull

Question 1

Name 3 internal grooves of the cranium

Answer 1

Superior sagittal groove.
Transverse groove.
Sigmoid groove.

Question 2

How many cranial and facial bones are there?

Answer 2

8 cranial, 14 facial.

Question 3

what are some functions of the frontal bone?

Answer 3

provide protection for frontal lobe of brain.

Question 4

What is the frontal squama?

Answer 4

Superior 2/3 of frontal bone.

Question 5

What is the function of superior and inferior temporal lines?

Answer 5

Superior: attachment for temporal fascia.
Inferior: proximal attachment of temporalis muscle.

Question 6

What are the 3 parts of the occipital bone?

Answer 6

Squamous, condylar, basilar.

Question 7

What is the joint between the occipital condyles and C1 known as?

Answer 7

Atlanto-occipital joint.

Question 8

What attaches to the E.O.P?

Answer 8

trapezius muscle.

Question 9

What is attached to the SNL? and INL?

Answer 9

SNL: Trapezius, SCM, splenius capitis.
INL: semispinalis capitis muscle.

Question 10

What are the 4 parts of the sphenoid bone?

Answer 10

Body, lesser wing, greater wing, pterygoid process.

Question 11

What passes through the optic grooves?

Answer 11

Sulcus where the optic chiasm, optic nerves cross leads to optic canals.

Question 12

What do the posterior clinoid processes serve as attachments for?

Answer 12

Tentorium cerebelli, membranous sheet that divides brain.

Question 13

What structures pass through the SOF?

Answer 13

Oculomotor, trochlear, Opthalmic, abducens, Opthalmic veins.

Question 14

What structures transmit the IOF?

Answer 14

Infraorbital nerve, zygomatic nerve (branch from Maxillary div of trigeminal nerve). Inferior orbital vein.

Question 15

What are the three parts of the temporal bone?

Answer 15

Squamous part, tympanic part, Petro-mastoid part.

Question 16

What attaches to the mastoid process?

Answer 16

SCM, splenius capitis, longissimus capitis.

Question 17

What passes through the stylomastoid foramen?

Answer 17

Stylomastoid artery, facial nerve.

Question 18

What transverses the carotid canal?

Answer 18

Internal carotid artery, deep petrosal nerve.

Question 19

What passes through the jugular canal?

Answer 19

Internal jugular vein, glossopharyngeal, vagus, and accessory nerves.

Question 20

What passes through the Internal acoustic meatus?

Answer 20

Facial nerve, vestibulocochlear nerve.

Question 21

When do sutures Form? when do they ossify?

Answer 21

Embryonic development, most by the age of 20.

Question 22

When will the metopic suture fuse?

Answer 22

3-9 months.

Question 23

When does the Anterior fontanelle close?

Answer 23

between 12-18 months.

Question 24

When does the posterior fontanelle close?

Answer 24

Between the 1st and 2nd months of age.

Question 25

When does the sphenoid fontanelle close?

Answer 25

6 months of age.

Question 26

When does the mastoid fontanelle ossify?

Answer 26

6-18 months of age.

Question 27

What are Wormian bones?

Answer 27

Abnormal ossicles that develop from extra ossification centres within the cranium.

Question 28

What passes through the mental foramen?

Answer 28

Mental nerve.

Question 29

What attaches to the coronoid process?

Answer 29

Temporalis muscle.

Question 30

what does the mandibular foramen serve as a conduit for?

Answer 30

Inferior alveolar nerve and artery.

Question 31

What passes through greater and lesser palatine foramen?

Answer 31

Greater and lesser palatine nerves.