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Flashcards in Head and Neck, Snell Deck (92):
1

Anterior fontanelle: Shape

Diamond

2

Anterior fontanelle: Closed by

18 months

3

Posterior fontanelle: Shape

Triangular

4

Posterior fontanelle: Closed by

End of 1st year of life

5

Orbital margins: Superior

Frontal bone

6

Orbital margins: Lateral

Zygomatic

7

Orbital margins: Inferior

Maxilla

8

Orbital margins: Medial

Processes of maxilla and frontal bone

9

Within the frontal bone, just above the orbital margins

Frontal air sinuses

10

Facial air sinuses serve as

Voice resonators

11

Anterior nasal aperture is formed by

1) Nasal bones
2) Maxilla

12

Nasal septum is largely formed by

Vomer

13

Shelves of bone that project into the nasal cavity

Superior and middle conchae

14

Carries the upper teeth

Alveolar arch

15

Sinuses that communicate with nasal cavity

1) Frontal
2) Maxillary
3) Sphenoid

16

Maxillary sinus: Shape

Pyramid

17

Zygomatic bone, articulations: Medial

Maxilla

18

Zygomatic bone, articulations: Lateral

Zygomatic process of temporal bone

19

Zygomatic bone: Articulates with zygomatic process of temporal bone to form

Zygomatic arch

20

Most common facial fracture

Nasal fracture

21

Fracture of the maxilla usually result from

Direct blow to the face

22

Severe blow to the orbit will cause fracture of

Orbital floor

23

Severe blow to the orbit will cause orbital contents to go into

Maxillary sinus

24

Severe blow to the orbit may damage this nerve

Infraorbital nerve

25

Fracture of the zygoma or zygomatic arch usually results from

Blow to the side of face

26

Frontal bone: Articulates with parietal bone at this suture

Coronal suture

27

Parietal bones: Articulate with each other at

Sagittal suture

28

Parietal bones: Articulate with the occipital bone at

Lambdoid suture

29

Thinnest part to the lateral wall of skull

Pterion

30

Where the anteroinferior part of the parietal bone articulates with the greater wing of the sphenoid

Pterion

31

Pterion overlies what vessels

Anterior division of middle meningeal artery and vein

32

Fossae on the base of the skull

Anterior, middle, posterior

33

Anterior cranial fossa: Separated from middle cranial fossa by

Lesser wing of sphenoid

34

Anterior cranial fossa: Lodges

Frontal lobes of cerebral hemispheres

35

Anterior cranial fossa: Cribriform plate of ethmoid transmits

Olfactory nerves

36

Middle cranial fossa: Separated from posterior cranial fossa by

Petrous part of temporal bone

37

Middle cranial fossa: Lateral parts lodge

Temporal lobes of cerebral hemispheres

38

Middle cranial fossa: Middle part is raised and formed by

Body of sphenoid

39

Middle cranial fossa: In front of the body of sphenoid

Sulcus chiasmatis

40

Middle cranial fossa: Sulcus chiasmatis leads to this structure on both sides

Optic canal

41

Middle cranial fossa: Optic canal transmits

1) Optic nerve
2) Ophthalmic artery

42

Middle cranial fossa: Sella turcica lodges

Hypophysis cerebri

43

Middle cranial fossa: Attachment of tentorium cerebelli

Posterior clinoid processes

44

Middle cranial fossa: Slitlike opening between the lesser and greater wings of sphenoid

Superior orbital fissure

45

Middle cranial fossa: Superior orbital fissure transmits

Live Frankly To See Absolutely No Insult
1) Lacrimal
2) Frontal
3) Trochlear
4) Superior ophthalmic
5) Abducent
6) Nasociliary
7) Inferior division of oculomotor

46

Middle cranial fossa: Perforates the greater wing of sphenoid at medial end of superior orbital fissure

Foramen rotundum

47

Middle cranial fossa: Foramen rotundum transmits

Maxillary division of trigeminal nerve (V2; V1-opthalmic, V3-mandibular)

48

Middle cranial fossa: Perforates the greater wing of sphenoid at posterolateral to foramen rotundum

Foramen ovale

49

Middle cranial fossa: Foramen ovale transmits

1) Mandibular division of trigeminal
2) Lesser petrosal nerve

50

Middle cranial fossa: Perforates the greater wing of sphenoid posterolateral to foramen ovale

Foramen spinosum

51

Middle cranial fossa: Foramen spinosum transmits

Middle meningeal artery

52

Middle cranial fossa: Between apex of petrous part of temporal bone and sphenoid bone

Foramen lacerum

53

Middle cranial fossa: Foramen lacerum transmits

Internal carotid artery

54

Weakest part of the skull base due to numerous foramina hence commonly fractured

Middle cranial fossa

55

Middle cranial fossa: Specific structures particularly vulnerable to fracture

1) Cavity of middle ear
2) Sphenoidal air sinuses

56

Posterior cranial fossa: Lodges (3)

1) Cerebellum
2) Pons
3) Medulla

57

Posterior cranial fossa: Occupies central area of the floor

Foramen magnum

58

Posterior cranial fossa: Foramen magnum transmits (3)

1) Medulla oblongata and its meninges
2) Ascending accessory nerves
3) 2 vertebral arteries

59

Posterior cranial fossa: Anterolateral boundary of foramen magnum

Hypoglossal canal

60

Posterior cranial fossa: Hypoglossal canal transmits

Hypoglossal nerve

61

Posterior cranial fossa: Between petrous temporal bone and condylar part of occipital bone

Jugular foramen

62

Posterior cranial fossa: Jugular foramen transmits

1) IX
2) X
3) XI
4) Sigmoid sinus

63

Posterior cranial fossa: Sigmoid sinus leaves the skull to become the

Internal jugular vein

64

Posterior cranial fossa: Pierces posterior surface of petrous part of temporal bone

Internal acoustic meatus

65

Posterior cranial fossa: Internal acoustic meatus transmits

1) VI
2) VII

66

Largest and strongest bone of the face

Mandible

67

Mandible: Faint ridge at midline of external surface

Symphysis menti

68

Mandible: Mental foramen transmits

Inferior alveolar nerve

69

Mandible: Medial surface of body

Submandibular fossa

70

Mandible: Submandibular fossa lodges

Submandibular gland

71

Mandible: Anterior to the submandibular fossa

Sublingual fossa

72

Mandible: Sublingual fossa lodges

Sublingual gland

73

Mandible: Between the sublingual and submandibular fossa

Mylohyoid line

74

Mandible: Alveolar part contains how many sockets

16

75

Ramus of mandible: Anterior process

Coronoid

76

Ramus of mandible: Posterior process

Condyloid process or head

77

Ramus of mandible: Coronoid and condyloid processes are separated by

Mandibular notch

78

Mandible: Neck is located

Inferior to condyloid process or head

79

Mandible: Medial surface of ramus

Mandibular foramen

80

Mandible: Mandibular foramen transmits

Inferior alveolar nerve

81

Mandible: Articulates with the temporal bone

Condyloid process

82

TMJ, ligaments: Fibers extend downward and backward

Lateral temporomandibular ligament

83

TMJ, ligaments: Lateral temporomandibular ligament limits

Posterior movement of mandible

84

TMJ, ligaments: Permits gliding movement in the upper part of the joint and hinge movement on the lower part of the joint

Articular disc

85

TMJ, muscles: Protrusion

Lateral pterygoid muscle

86

TMJ, muscles: Retraction

Posterior fibers of temporalis

87

TMJ, muscles: Depression (3)

1) Digastric
2) Geniohyoid
3) Mylohyoid

88

TMJ, muscles: Elevation (3)

1) Temporalis
2) Masseter
3) Medial pterygoid

89

Muscles of mastication (4)

1) Masseter
2) Temporalis
3) Lateral pterygoid
4) Medial pterygoid

90

Muscles of mastication: Innervation

Mandibular division of trigeminal

91

Muscles of mastication: Develop from

First pharyngeal arch

92

Mandible: Seen below the 2nd premolar tooth

Mental foramen