Ch 11 Joints of the Skull Flashcards
True or false: there are ligaments and movement involved with the suture joints
false
What kind of joint are sutures of the skull?
fibrous joints
What type of fibrous joints are sutures of the skull?
sutures
The 4 sutures of the skull are the :
sagittal, frontal AKA coronal, lambdoid, and squamous sutures
The _ suture is the articulation of the 2 parietal bones in the median plane of the skull.
sagittal
The frontal suture AKA coronal suture is the articulation of the _ bones with the frontal bone
parietal
The _ suture is the articulation of the parietal bones and the occipital bones.
lambdoid
The _ suture is the articulation of the parietal bones with the temporal bones.
squamous
All of the sutures articulate which bone/s?
the parietal bones
The temporomandibular joint is what kind of joint?
synovial
The synovial joint of the TMJ is a _ and _ joint.
hinge and plane
The bony surfaces involved in the TMJ are the:
-mandibular fossa of the temporal bone
-the head AKA condyloid process of the mandible
The one prominent intraarticular ligament of the TMJ is called the _ _.
articular disc
The intraarticular disc of the TMJ is an oval plate of _ tissue that sometimes contains patches of _.
fibrous, fibrocartilage
The articular capsule of the TMJ attaches to the _ of the disc.
circumference
The articular disc of the TMJ divides the joint cavity into the _ and _ compartments
superior and inferior compartments
The superior compartment of the TMJ cavity is located between the _ _ and the _ _.
articular disc and the mandibular fossa
The inferior compartment of the TMJ cavity is located between the _ _ and the _.
articular disc and the mandible
Hinge movement of the TMJ include:
-depression (inferior movement of mandible/ opens mouth)
-elevation (superior movement of mandible/ closes mouth)
Planar movement of the TMJ include:
-protraction (anterior movement of mandible on horizontal plane)
-retraction (posterior movement of mandible on horizontal plane)
-lateral movement (side to side grinding movement)
The bones of the fetal skull are not completely _ at birth.
ossified
There are _ major unossified membranous areas between the cranial bones called fontanelles and they are:
6,
-anterior fontanelle
-posterior fontanelle
-anterolateral fontanelles AKA sphenoid fontanelles (2)
-posterolateral fontanelles AKA mastoid fontanelles (2)
“fontanelle”=
little fountain
The _ _ is the largest fontanelle and in adults this lies at the location of the _.
anterior fontanelle, bregma
The _ fontanelle is triangular and in adults lies at the location of the lambda.
posterior fontanelle
The anterior fontanelle is found at the junction of the _ and _ sutures.
coronal AKA frontal sutures and the sagittal sutures
The posterior fontanelle is found at the junction of the _ and _ sutures.
lambdoid and sagittal sutures
Which 2 fontanelles have the sagittal suture as part of their junction point?
anterior and posterior
The anterolateral AKA sphenoid fontanelles are small irregular fontanelles found at the junction of the _, _, _, and _ bones.
frontal AKA coronal, parietal, sphenoid, and temporal bones
The posterolateral AKA mastoid fontanelles are small irregular fontanelles found at the junction of the _, _, and _ bones.
occipital, parietal, and temporal bones.
Both posterolateral fontanelles touch a total of _ bones.
5
-occipital (1) + parietal (2) + temporal (2) = 5
True or false: The anterior and posterior fontanelles touch a total of 4 bones each.
False,
3 bones each!
-anterior: frontal (1) + parietal (2)= 3
-posterior: occipital (1) + parietal (2) =3
The anterior fontanelle helps the physician determine 3 things:
-position of fetal head in utero
-development of the skull
-extent of pathological intracranial pressure
The last fontanelle to ossify is the _ fontanelle at about _ years of age.
anterior, 2 years old
“soft spot”=
anterior fontanelle in babies
