Exam 3: Head

Question 1

What part of skull is derived from endochondral oss

Answer 1

Chondrocranium

Question 2

What bones formed from chondrocranium

Answer 2

Inf nasal concha, ethmoid, part of mandible, sphenoid, temporal and occipital

Question 3

Which skull bones are ossified by both endochondral and intramembranous oss

Answer 3

Mandible, sphenoid, temporal and occipital

Question 4

Which bone of appendicular skeleton formed by both types of oss

Answer 4

Clavicle

Question 5

How many bones form skull

Answer 5

28 (including auditory ossicles)

Question 6

What is cranium

Answer 6

Skull minus mandible

Question 7

Characteristics of sutura notha (false sutures)

Answer 7

Sutures lacking interlocking of adjacent bone surfaces; formed by endochondral oss

Question 8

What is classification of a joint w/ nail-like condition

Answer 8

Gomphosis

Question 9

Classification of a joint with fissure-like condition

Answer 9

Schindylesis

Question 10

What are examples of schindylesis type of suture

Answer 10

Sphenoid — ethmoid — vomer

Palatine — maxilla — vomer

Question 11

Examples of gomphosis joint

Answer 11

Maxilla — root of tooth

Mandible — root of tooth

Question 12

Ligament associated w/ gomphosis

Answer 12

Periodontal lig

Question 13

5 views of skull

Answer 13

Norma: verticalis, frontalis, occipitalis, lateralis, basalis

Question 14

Diamond shaped remnant of developing membrane bone at intersection of frontal w/ parietal bones

Answer 14

Anterior fontanelle

Question 15

Diamond shaped remnant of developing membrane bone at intersection of occipital w/ both parietal bones

Answer 15

Posterior fontanelle

Question 16

What is the glabella

Answer 16

Elevation of bone over frontal sinus between orbits

Question 17

What is name given to indentation of bone between nasal and frontal bones

Answer 17

Nasion

Question 18

Name given to outline of nasal cavity at front of skull

Answer 18

Piriform aperture

Question 19

Name given to alveolar jugum of canine tooth in maxilla

Answer 19

Canine eminence

Question 20

Depression of maxilla occurs medial to canine eminence

Answer 20

Incisive fossa

Question 21

What forms bullet-like chin

Answer 21

Large mental protuberance

Question 22

What forms indented chin

Answer 22

Well developed bilateral mental tubercles and slight mental protuberance

Question 23

What is tip of external occipital protuberance called

Answer 23

Inion

Question 24

Bones that form pterion

Answer 24

Parietal
Temporal
Sphenoid
Frontal

Question 25

Bones that form asterion

Answer 25

Parietal Temporal Occipital

Question 26

Styloid process is feature of what bone

Answer 26

Temporal

Question 27

Points on skull used to measure skull size

Answer 27

Nasion Vertex Inion Gnathion

Question 28

Points on skull used to measure cranial vault capacity

Answer 28

Nasion Vertex Inion

Question 29

Appearance of suture intersections over hard palate

Answer 29

Cruciate or cruciform suture

Question 30

Posterior boundary of anterior cranial fossa

Answer 30

Line drawn along lesser wing of sphenoid, anterior clinoid processes and sphenoidal jugum

Question 31

Ostia observed in anterior cranial fossa

Answer 31

Cribriform plate Anterior/posterior ethmoid foramina Foramen cecum

Question 32

What passes thru cribriform plate

Answer 32

Fila olfactoris of CN I (olfactory n)

Question 33

An emissary vein leaves anterior cranial fossa via what opening

Answer 33

Foramen cecum

Question 34

What are anterior boundaries for middle cranial fossa

Answer 34

Lesser wings, anterior clinoid and sphenoidal jugum of sphenoid

Question 35

What are posterior boundaries for middle cranial fossa

Answer 35

Superior border of petrous part of temporal, posterior clinoid and dorsum sella of sphenoid

Question 36

Bony feature that is prominent in medial plane of middle cranial fossa

Answer 36

Sella turcica

Question 37

What forms roof of sella turcica

Answer 37

Diaphragma sella

Question 38

Neural structure occupies sell turcica

Answer 38

Hypophysis cerebri (pituitary gland)

Question 39

Contents of optic canal

Answer 39

Optic nerve and ophthalmic artery

Question 40

Contents of superior orbital fissure

Answer 40

Ophthalmic V Oculomotor and trochlear N Ophthalmic div of trigeminal Abducent N

Question 41

Single opening that allows exit of greatest number of cranial nerves

Answer 41

Superior orbital fissure

Question 42

Unique about ophthalmic A and V

Answer 42

Don’t share same opening Artery = optic canal Veins= superior orbital fissure

Question 43

Maxillary division of trigeminal exits middle cranial fossa via which opening

Answer 43

Foramen rotundum

Question 44

What are contents of foramen ovale

Answer 44

Mandibular division of tri | Lesser petrosal branch of glossopharyngeal

Question 45

Contents of foramen spinosum

Answer 45

Nervus spinosus from mandibular div trigeminal | Middle meningeal A

Question 46

Opening allows branch of CN Vc to enter middle cranial fossa from infratemporal region

Answer 46

Foramen spinosum

Question 47

Vessel located within foramen spinosum

Answer 47

Middle meningeal A

Question 48

Contents of foramen lacerum

Answer 48

Internal carotid A Carotid sympathetic N plexus Venous plexus

Question 49

Contents of carotid canal

Answer 49

Internal carotid A | Carotid sympathetic N plexus

Question 50

Contents of hiatus for greater petrosal nerve

Answer 50

Greater petrosal N, branch of facial N

Question 51

Contents of vidial/pterygoid canal

Answer 51

Vidian N or N of pterygoid canal

Question 52

Contents of hiatus for lesser petrosal N

Answer 52

Lesser petrosal N, a branch of tympanic plexus from glossopharyngeal N

Question 53

What forms roof of posterior cranial fossa

Answer 53

Tentorium cerebelli

Question 54

Part of cerebrum occupies posterior cranial fossa

Answer 54

None

Question 55

Part of CNS that occupies posterior cranial fossa

Answer 55

Cerebellum Pons Medulla oblongata

Question 56

Bony feature prominent in median plane of posterior cranial fossa

Answer 56

Clivus or basilar part of occipital bone

Question 57

Cranial nerves that exit posterior cranial fossa ostia

Answer 57

CN VII, VIII, IX, X, XI, XII

Question 58

Which ostia allow exit from posterior cranial fossa

Answer 58

Foramen magnum Internal acoustic meatus Jugular foramen Hypoglossal and condylar canals

Question 59

Jugular bulb

Answer 59

Venous expansion between sigmoid DVS and internal jugular vein

Question 60

Function of jugular body/glomus

Answer 60

Chemoreceptive organ, monitors hypoxia, hypercapnia and increases H ion

Question 61

Cranial nerves located within hypoglossal canal

Answer 61

CN XII hypoglossal

Question 62

Contents of condylar canal

Answer 62

Emissary V connection sigmoid DVS and vertebral venous plexus