Skull Flashcards

1
Q

Skull

A

cranium+mandible

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2
Q

2 parts of the cranium

A

neurocranium
viscerocranium

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3
Q

Neurocranium

A

the bony covering of the brain and its meninges
contains proximal parts of cranial nerves and vasculature of the brain

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4
Q

Calvarium

A

skull cap

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5
Q

Basicranium

A

cranial base

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6
Q

8 bones united by sutures

A

frontal
ethmoid
sphenoid
occipital
parietals
temporals

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7
Q

Viscerocranium

A

bones of the facial skeleton
forms the anterior part of the cranium
consists of bones that surround the mouth, nose, and most of the orbits

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8
Q

15 bones of the viserocranium

A

mandible
ethmoid
vomer
maxillae
inferior nasal conchae
zygomatics
palatines
nasals
lacrimals

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9
Q

Frontal bone

A

forms the forehead, roofs of the orbits, superciliary arches superior to the orbital apertures
contains frontal paranasal sinuses

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10
Q

Parietal bones

A

form the superior and lateral parts of the skull

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11
Q

coronal suture

A

runs in the coronal plane
located anteriorly where the parietal bone meets the frontal bone

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12
Q

Squamous suture

A

occurs where each parietal bone meets a temporal bone inferiorly

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13
Q

Sagittal suture

A

occurs where the right and left parietal bones meet superiorly in the midline of the

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14
Q

Lambdoid suture

A

occurs where the parietal bones meet

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15
Q

Sutural bones

A

small bones that occur within sutures

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16
Q

occipital bone

A

forms the posterior portion of the cranium and cranial base

17
Q

foramen magnum

A

located at the base of the occipital bone

18
Q

occipital condyles

A

articulate with C1 vertebra

19
Q

Nuchal lines

A

anchor muscles of the back and neck

20
Q

Temporal bones

A

lie inferior to the parietal bones
Form the inferolateral region of the skull and parts of the cranial floor

21
Q

Sphenoid bone

A

spans the width of the cranial floor
situated between the bones of the cranial vault and those of the face
greater wings
lesser wings

22
Q

Ethmoid bone

A

a light spongy bone that lies between the nasal and sphenoid bones
forms most of the medial bony region between the nasal cavity and orbits

23
Q

Crista galli

A

anchor point for dura mater

24
Q

Mandible

A

largest and strongest facial bone

25
Mandible horizontal body
anchors the lower teeth and forms the chin
26
Mandible two upright rami
project superolaterally from the body, mandibular angle
27
Coronoid process
provides an insertion for the temporalis
28
Mandibular condyle
articulates with the temporal bone to form the temporomandibular joint
29
Maxillary bones
contains maxillary sinuses form the upper jaw and central part of the facial skeleton hold the tooth roots and form most of the nasal aperture and floor
30
zygomatic bones
form the lateral wall of the orbits and prominences of the cheeks
31
Nasal bones
form the bridge of the nose
32
Lacrimal bones
delicate bones located in the medial orbital walls
33
Palatine bones
lie posterior to the maxillae and complete the posterior part of the hard palate
34
Vomer
a slender bone that lies in the nasal cavity and forms the inferior part of the nasal septum
35
Inferior nasal conchae
thin, curved bones that project medially from the lateral walls of the nasal cavity
36
Postnatal skull growth
at birth, the bones of the calvarium ossify outward from their centers of ossification and the bones are connected to one another by fibrous membranes
37
Fontanelles
allow for skull compression during childbirth and brain expansion during postnatal growth
38
Synchondroses
immovable, cartilaginous joints between bones of the skull base
39