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Procedures Vl

SKULL Anatomy

QuestionAnswer
GML glabellomeatal line - line b/t glabella and EAM
OML orbitmeatal line- line b/t oter cantus and EAM
IOML infraorbitmeatal line-line b/t IOM and EAM
AML aconthiomeatal line- line b/t acanthion and EAM
MML mentalmeatal line- line b/t mental point and EAM
LML lips meatal line- line b/t lips and EAM
define tragus sm flap that covers opening of ear
TEA top of ear attachment
what is the auricle exteral portion of ear
where is the inner canthus where eyelids meet near the nose
where is the outecantus later junction of the eye lids
what is the SOM Superior rim of bony orbits of the eye
IOM infaorbital margin inferior rim Of bony orbits of the eye
IPL interpupillary line transverse line runs between both eyes
Glabella Smooth slightly raised triangular area between and slightly superior to the eyebrows above the bridge of the nose
Nasion At the junction of the two nasal
acanthion Midline point of junction of the upper lips and nasal septum
gonion Lower posterior angle at side of jaw or mandibles
name the 4 sutures coronal lambdoidal Squamosal and sagittal
name the junction points lambda asterion bregma pterion LAB-P
What are the four parts in the occipital bone the squama 2 occipital condyles foreman magnum
On the occipital bone; What is the external surface of the squama with a prominent process called inion
What does the temporal bone articulate with Parietal ,occipital, sphenoid and 2 facial bones the mandible and the zygomatic bone
Where does the top ridge lie of the Petrus portion level of TEA
What portions do the temporal bone consist of Squamous portion mastoid portion petrous portion
Describe squamous portion of the temporal bone Thin upper portion
Described tympanic portion Of the temporal bone Portion below the squama and in front of the mastoid and Petrus portion
Describe the mastoid portion of the temporal bone For the temporal bone it is prolonged into conical mastoid process
True or false air cells are located in the mastoid portion of the temporal bone true
What part of the temporal bone is the thickest densest in the cranium Petrus portion
Where are the hearing organs located in the temporal bone In the Petrus portion
How is the parietal bone shaped the external portion is convexed an and internal portion is concave
What does the parietal bone articulate Frontal temporal occipital the sphenoid and opposite parietal bones
What does the ethmoid bone consist of Horizontal and vertical plate into lateral masses called labrynths
What does that ethmoid bone articulate with Frontal and sphenoid bone
Where is the ethmoid bone located Between the orbits
what does the ethmoid bone form bony nasal septum orbital walls nasal cavity Anterior cranial fossa BONA
is the cribriform PlateOn the ethmoid bone horizontal perpendicular or vertical Horizontal
Describe the cristagalli Of the ethmoid bone thick process project superiorly from its anterior midline
Describe the perpendicular plate on the ethmoid bone Vertical portion of the ethmoid bone superior portion of the bony septum of the nose
What is distinguishable on the cribriform plate It has many foramina for transmission of olfactory nerves
Name the parts of the ethmoid bone that you see on the coronal view Cribriform plate Lateral mass perpendicular plate and middle nasal concha superior nasal concha crista galli
What does the frontal bone articulate with Right and left parietal's Sphenoid Ethmoid bones of the cranium
Where is the ethmoidal notch Between the orbital plate this notch receives the cribriform plate of the ethmoid bone
Where is the nasal spine located Superior most component of the nasal septum and it's the anterior edge of the ethmoidal notch
What does the frontal bone form Forehead and superior part of each orbit
What are the two main parts of the frontal bone Frontal squama or vertical portion and orbital horizontal portion
On the frontal bone what does the squama or vertical portion form Forms the fore head
On the frontal bone what does the orbital bowl or the horizontal portion form it forms part of the Orbits and part of the nasal roof
On the frontal bone Describe the frontal Eminence a round elevation each side of the midsagittal plane
What are the three small openings on the sphenoid bone for passage of nerves and vessels Rotundum foramina ovale foramina spinosum foramina
How many cranial bones are there 8
What are the bones of the calvarium Frontal (1) occipital(1) Parietal (2)
What is another name for calvarium Skullcap
What are the bones of the skull floor Ethmoid ,sphenoid, temporal
What is distinguishable looking about the sphenoid bone It looks like a bat or butterfly
what is the functionOf the sphenoid bone It's the anchor for all eight cranial bones
What does a sphenoid bone consist of 2-Lesser wings 2- Greater wings 2 - ptergoid process
How many facial bones are there 14
What does the sella turcica do Protects the pituitary gland
describe the sella turcica Central depression seen on the lateral means "turkish saddle "
Name all parts of the sphenoid bone on the superior view The Superior orbital fissure Optic canal Optic groove Lesser wing Greater wing Sphenoidal spine Anterior clinoid process Posterior Clinoid process sella turcica Tuberculum sellae dorsum sellae foramen ovale foraman spinosum foramen rotundum
What does the Clivus support pons
Where does the optic groove end Each side at the optic Canal
Where does the optic groove extend Across the anterior portion of the tuberculum Sallae
where and what is the sella turcica bounded by anteriorly; by the tuberculum sellae
How many wings does the sphenoid have 4 2 lessor 2 greater
What do the greater wings of the sphenoid bone form Part of the floor and sides of the cranium
Name the parts of the frontal bone on the anterior view Frontal eminence frontal squama supraorbital margin supraorbital foramen supercillary arch nasal spine glabella
Coronal Suture separates frontal bone from both parietal bones.
Sagittal Suture separates both parietal bones in the midline. Anterior portion is known as the Bregma. Posterior aspect is called Lambda.
Lambdoidal Suture separates the two parietal bones from the occipital bone.
Squamosal Suture are formed by the inferior junctions of the two parietal bones with their respective temporal bones.
Pterions Suture points at the junction of the parietals, temporals, and greater wings of the sphenoid.
where is the Asterions Suture point located corresponding to the posterior end ear where quamosal and Lambdoidal sutures meet.
what are sutures points are used in surgery where cranial measurements are necessary.
define fontanels
soft spots are termed the anterior and posterior fontanels in an infant.
The cranial suture themselves generally do not ossify completely until what age until an individual is their mid to late 20’s.
Six fontanels in infants • Anterior fontanel – Bregma in adult • Posterior fontanel – Lambda in adult • Right sphenoid fontanel – Right pterion • Left sphenoid fontanel – Left pterion • Right mastoid fontanel – Right asterion • Left mastoid fontanel - Left asterion
Mesocephalic skull Skull of average shape. Width is 75% to 80% of the length. Angle difference between the petrous pyramid and the MSP – 47 degrees. Skull
Brachycephalic skull A short, broad head is termed brachycephalic. 80% or greater than the length. Angle difference between the petrous pyramid and the MSP – greater than 47 degrees. (approx. 54 degrees)
Dolichocephalic Skulls A long, narrow head is called dolichocephalic. Less than 75% Angle difference between the petrous pyramid and the MSP – less than 47 degrees. (approx. 40 degrees)
describe the clivus clivus latine for "slope" at the skull base shallow depression behind the dorsum sallae slopes obliquely backwards
what kind of joints are sutures immovable fibrous joints or synarthroses
define sutures Articulations or joints of the cranium
Created by: knt5411