Paired Bones Flashcards
paired bones of the cranial vault and temorals
frontals parietals and temporals
ROTATE EXTERNALLY during flexion
paired bones of the face
maxilla, palatines and zygomae
ROTATE EXTERNALLY during flexion
what bones does the parietal articulate with
- occiput
- frontal
- sphenoid
- temporal
- opposite parietal
sutures of the parietal bone
bregma and lambda, asterion, pterion
parietosquamous, parietomastoid coronal lambdoidal
what is the only bone that contacts all four fontanelles
parietal bone
surface anatomical features of the parietal bones (3)
upper temporal ridge - temporal fascia attachment
lower temporal ridge - temporalis muscle origin
temporalis fossae - filled iwth temporal muscle
a groove along the inside of the sagittal suture in which the sagittal sinus runs
sagittal sulcus
interior anatomical features of parietal bones
sagittal sulcus
anterior and posterior groove for the middle meningeal artery
portion of groove for the Transverse sinus - carries marginal insertion of the tentorium cerebelli
parietal bone
inferior borders move laterally
superior borders move medial and inferior
pterion, asterion, squamous sutures move laterally
sagittal sutures move inferiorly
what is the motion of the SBS
sbs flexion - parietal bones externally rotate
parietal
sagittal articulation moves inferiorly
temporal articulation moves laterally
cranium widens
what motion?
external rotation of the parietal bones
mechanical and joint related pain of parietal bone SD
cranial syntosis - premature closing of the sutures head pain - pain along the suture OM & asterion - tension HA pterion - temporal HA parietosquamous
organ/myofascial dysfunction leading to parietal bone SD
middle meningeal a - truama, giant cell arthritis
head face and tooth pain - temporal SD
most common form of synostosis- premature fusion of which suture that restricts transverse growth of the skull
sagittal synostosis
sagittal suture
commonly mistaken for posterior postioning plagiocephaly
flattening of the back of the head and compensatory growth of the mastoid process on the ipsilateral side leads to characteristic tilt of cranial base
lambdoid synostosis
structures contained within the petrous portion of hte temporal bone
otovestibular organ
eustachian tube exits between the sphenoid and temporal bones
border of the foramen lacerum (with sphenoid)
attachment of the tentorium
encloses the internal carotid a
lateral part of the jugular foramen
styloid process
in a newborn skull, what portion of the temporal bone is missing
mastoid process
muscles that attach to the temporal bone
splenius digastric longissimus capitis sternocleidomastoid stylohyoid styloglossus masseter
internal rotation of the temporals will place pressure no the eustachian tube, resulting in what pitch of tinnitus/
high pitch tinnitus
external rotation of the temporals will often produce what pitch of tinnitus
low pitch tinnitus
low roaring sound i
where is the axis fo the temporal bone located
inferior to the petrous ridge
temporal
squamous portion moves laterally
MP moves medially
external rotation
paired with flexion
temporal
squamous portion moves medially
MP moves laterally
zygomatic process becomes more prominent
internal rotation
paired with flexion
what bone drives motion of the temporal
occiput
through OM artiuclation
wobbly wheel is what bone motion
temporal physiologic motion
mechanical signs and symptoms of temporal bone SD
TMJ pain
Head pain along a suture - OM and asterion - tension \ pterion - temporal - parietosquamous
neck pain - SCM and other muscles
organ/nerve/muscle signs and symptoms of temporal bone SD
dizziness
ear infections
swallowing and chewing - stylohyoid, stylomandibular, styloglossus
tinnitus and eustachian tube dsyfunction - IR with high pitch roar ER with low pitch roar
Bell’s palsy - CNVII
why are the frontal bones considered paired?
because they start out as two bones in infancy
metopic suture is the remnant of the fusion of these bones, found in 10% of adults
what bones does the frontal bone articulate with
parietals sphenoid ethmoid alcrimals maxillae nasals zygoma
even though the frontal bone is fused, it still has movement as if
it is made of two bones
plane of movement of frontal bone
coronal plane motion
metopic has hinge like action
what occurs at the frontal bone during SBS flexion
EXTERNAL ROTATION
lateral side moves anterior/lateral and slightly inferior
glabella moves posterior
waht occurs at the frontal bone during SBS extension
INTERNAL ROTATION
lateral side moves posterior/medial and slightly superior, glabella moves anteriorly
what bone moves the frontal bone during external rotation
sphenoid
mechanical/pain manifestations of frontal bone SD
head pain along a suture
coronal - tension | pterion - temporal HA
head pain from diminished primary repsriation and CSF flow d/t increased dural tension at the cribiform plate
organ/nerve/muscle manifestations of frontal bone SD
sinusitis (allergic or infectious)
visual problems (double vision)
anosmia - frontal influences cribiform plate
frontalis muscle TrP/TP
bracycephaly occurs as a result of fusion fo what bones
restricts growth of the anterior fossa resulting in a shorter and wider than normal skull
compensatory vertical growth occurs
fusion of both coronal sutures
what is bracycephaly assocaited with
crouzon, apert, saethre-chotzen, muenke, pfeiffer syndromes
premature fusion of what bone results in anterior plagiocephaly
limits the anterior growth fo the skull, invovles top of skull and cranial base
causes deformities of the face, ear, nose and forehead
c shaped deformity
premature fusion of one coronal suture
start looking here
what are the fontanelles that the parietal bone contacts
all four fontanelles
idk what they are called
what bones does the parietal bone contact???
occiput frontal sphenoid temporal opposite parietal
how does the parietal bone move during SBS flexion
inferior borders move
superior borders move:
pterion, asterion, squamous sutures move:
sagittal sutures move slightly :
ER and
inferior borders move LATERALLY
superior borders move: MEDIALLY AND INFERIORLY
pterion, asterion, squamous sutures move: LATERALLY
sagittal sutures move slightly : INFERIORLY
how does the parietal bone move during SBS extension
sagittal articulations move:
temporal articulations move:
cranium
IR and
sagittal artiuclations move superiorly
temporal articulations mvoe medially
cranium narrows laterally
what is the axis and plane of motion of the parietal bone
AP axis
coronal plane of motino
what are clinical associations with parietal bone dysfunction
cranial syntostosis - premature closing of the sutures
head pain along a suture (OM/ASTERION - tension | pterion - temporal | parietosquamous)
middle meningeal artery
head face and tooth pain
what are the parts of the temporal bone
squamous portion containg the zygomatic process petrous portion
what anatomic structures are associated with the petrous portion of the temporal bone
otovestibular organ eustachian tube exit between temporal and sphenodi bone border of foramen lacerum with sphenoid attachment of the tentorium encloses the internal carotid a lateral part of the jugular foramen styloid process
what bones do the temporal bones contact
sphenoid maxilla parietal occiput mandible (tmj)
how does the temporal bone move during SBS flexion
ER and
squamous portion mvoes laterally
mastoid process moves medially
low pitch
how does the temporal bone move during SBS extension
IR and
squamous portino moves medially
mastoid portion moves laterally
high pitch
what is the axis and plane of motion for the temporal bone
axis is inferior to petrous ridge
somewhat oblique transverse axis
motion would be coronalish
what are clinical assocations with temporal bone dysfunction
tmj pain
head pain along sutures (om and asterion -tension HA, pterion - temporal - paritosquamous)
neck pain - lots fo msucle attachments
dizziness, ear infections, swallowing and chewing, tinnitis and eustachian tube dsyfuntion
bells palsy
why is the frontal bone considered a paired bone
starts out as two bones before fusing - metopic suture represents this fusion in 10% of people
what bones does the frontal bone contact
parietals sphenoid ethmoid lacrimals maxillae nasals zygoma
how does the frontal bone move during SBS flexion
ER and
lateral side moves anterior/lateral and slightly inferior
glabella moves posterior
how does the frontal bone move during SBS extension
IR and
lateral side moves posterior/medial and slightly superior, glabella moves anterior
what is the axis and plane of motion for the frontal bone
metopic has hinge-like action
coronal plane motion
moves from center of orbital roof through frontal eminence
what are clinical associations with frontal bone dysfunciton
head pain coronal - tension , pterion with temporal
head pain - from diminished primary respirations and CSF flow d/t increased dural tension at the cribriform plate
sinusitis
visual problems
anosmia
frontalis muscle TrP/TP
