Bones Of Articulation Ch 6

Front 1

Parietal Bones

Back 1

-paired
-united by sagittal suture
-separated from occipital lobe by lambdoidal suture

Front 2

Frontal bone

Back 2

-unpaired
-makes up forehead
-provides superior surface of eye socket

Front 3

Occipital Bone

Back 3

-unpaired
-articulates with temporal, parietal & sphenoid bones
-forms base of skull
-foramen magnum is located here for the spinal cord
-condyles: resting point for first cervical vertebrae

Front 4

Temporal Bone

Back 4

-separated from parietal bone by squamosal suture
- 4 segments: squamous, tympanic, mastoid, petrous

Front 5

Temporal Fossa

Back 5

region including part of temporal and parietal bones
-point of origin for temporalis muscle

Front 6

Articulation

Back 6

process of joining two elements together

Front 7

Articulation for Speech

Back 7

brings 2 or more moveable speech structures together to form speech sounds

Front 8

Source Filter Theory

Back 8

-how oral cavity shapes speech
-voicing source is generated by vocal folds
-routed through vocal tract
-then shaped into sounds of speech

Front 9

Resonant Frequency

Back 9

the frequency of sound to which the cavity most effectively responds
-determined by volume and length
-moving the articulators changes the shape of the vocal tract which in turn changes the resonant frequency

Front 10

Tongue

Back 10

largest mobile articulator

Front 11

Velum

Back 11

-movable articulator
-used to differentiate

Front 12

Lips

Back 12

-used to create different sounds
-many different configurations during speech

Front 13

Cheeks

Back 13

-help change shape of cavity
-offer stability to oral cavity

Front 14

Mandible

Back 14

-unpaired bone
-makes up lower jaw
-mental symphysis: point of fusion of the paired bones
-mental foramen: opening for branch of CN V
-condylar process: articulates with skull, allows rotation of mandible

Front 15

Maxillae

Back 15

-paired bone
-makes up roof of mouth (hard palate), nose & upper dental ridge
-landmarks: frontal process (most superior part of bone), infraorbital foramen (branch of CN V runs thru here)

Front 16

Alveolar process of Maxillae

Back 16

tooth bearing ride

Front 17

Palatine processes of the Maxillae

Back 17

make up 3/4 of hard palate
-1/4 is horizontal plate of palatine bone

Front 18

Palatine bones

Back 18

horizontal plate makes up 1/4 of hard palate
-makes up posterior nasal cavity
-orbital processes

Front 19

Vomer

Back 19

-Unpaired midline bone
-makes up the inferior & posterior nasal septum
-articulates with sphenoid rostrum & perpendicular plate of the ethmoid bone

Front 20

Nasal Septum

Back 20

Composed of vomer & perpendicular plate of ethmoid bone and midline septal cartilage

Front 21

Zygomatic bone

Back 21

-cheekbones
-makes up lateral orbit

Front 22

Lacrimal bones

Back 22

articulate with maxillae, frontal bone, and inferior conchae

Front 23

Ethmoid bone

Back 23

-forms core of cranial & facial skeleton
-crita galli: superior surface that protrudes into cranial space
-perpendicular plate: projects down

Front 24

Cribriform Plates

Back 24

-separate nasal & cranial cavities
-provide conduit for olfactory nerves

Front 25

Sphenoid bone

Back 25

-butterfly shape
-greater wings: arise from posterior corpus, articulate with frontal and temporal bones
-lesser wings: arise from corpus, partially cover optic canal
-pterygoid processes: project down from greater wings and corpus