Ear and Nose Flashcards
the pinna
ear
change less in a life time than any other feature
ear
formed like a wedge
ear
made of cartilage except for lobe
ear
anatomical structures for locating modeled eaer
external auditory meatus
zygomatic arch
mandibular fossa
mastoid process
ear = length of ___
nose
ear is ___ of face
1/3rd
2x ear = ___ lenght of face
2/3rds
internal ear bones
malleus
incus
stapes
have no effect on surface form of ear
internal ear bones
hollows and cavities of ear
ear passage concha (shell) triangular fossa scapha intertragic notch
elevations and ridges of ear
helix and crus antihelix and crura tragus antitragus lobe
hole located inferior portion of medial 1/3rd of ear; on anterior border, orifice leading into organ of hearing; not visible from front/direct profile view
ear passage
deepest depression of ear; above and behind ear passage; vertical dimension is partially/completely divided into 2sections by crus/leg of outer rim of ear; walled in on all sides by bordering parts of ear, their size and form affect size
concha
second deepest depression in ear; depression between crura of ear; in between superior and inferior crus
triangular fossa
between inner and outer rims of ear; shallowest depression of ear; length, width, and dept vary
scapha
opening between tragus and antitragus; spillway of ear
intertragic notch
outer rim of ear; looks kinda like ?; may originate in interior anterior of medium wall of concha, could in middle area/posterior area; anterior portion merges with tempal
helix
inner rim of ear
antihelix
bifurcation of antihelix of ear
crura of antihelix
elevation that protects ear; projects from posterior margin of lateral cheek, porjects both laterally and posteriorly
tragus
obliquely opposite tragus; on superior border of lobe; help form intertragic notch
antitragus
inerior fatty 1/3rd of ear; lower part; anteriorly attach to face and part of intertragice notch; superiorly attach to intertragic notch, antitragus, antihelix, and helix
lobe
use and anterior margin as guide, assume line of tempal, tragus and lobe, anterior margin is paralele to nose; on profile from median line of brown out to median line of upper lip
inclination of ear
comparative size of length of nose to width of nose as indicated by its bony structure
nasal index
extends from root of nose to base of nasal cavity
length
widest part of nasal cavity
width
long, narrow and high bridged
leptorrhine
associated with those of western european decent
leptorrhine
medium, broad, and medium low bridged
mesorrhine
associated with asia
mesorrhine
short, broad and minimum amount of projection
platyrrhine
associated with africa
platyrrhine
profile classifications
linear outline of dorsum
most common type of nasal profile
straight/greek/greecian
exhibits straight line from root to tip
straight/greek/greecian
4 variations of straight/greek/greecian
long, short profile; high, low tip
anterior ridge of straight/greek/greecian
straight line
bump/hump in linear form
convex/roman/aguiline
nose which ahs hook from profile view; beak of eagle
convex/roman/aguiline
4 variations of convex/roman/aguiline
more superior/inferior; doesnt matter as long as bump in nose
internal curve; gentle curve; dips concavely
concave; pug;/infintine/shrub/retrouse
4 variations of concave;pug/infintine/shrub/retrouse
dip more superior/inferior
anatomy of nose
nasal bones
nasal spine
major cartilage of nose
septum
superior lateral cartilage 2
inferior lateral cartilage 2
vertical cartilage divides into 2 chambers; responsible for assymmetry; right slightly larger than left
septum
supplies all projection of inferior half of nose
septum
cartilage attaches to vomer bone and perpendicular plate of ethmoid bone
septum
give great structure to inferior part; provides fullness to nose
superior and inferior lateral cartilage
parts of nose composed of
root, bridge, protuding lobe (tip)
protruding ridge of nose
dorsum
tip, concave dip inferior to forehead; below glabella
root
arched dome over nasal bones
bridge
spherical at end; joins wing and column nasi
protruding lobe
form widest part of nose
wings
medial partition between nostrils; skin partition; not septum
columna nasi
most inferior part of nose
columna nasi
widest at base; sometimes bent to 1 side
columna nasi
inclinations of columna nasi (3)
horizontal, depressed, elevated
external nostril openings
nares
lateral walls between wings and bridge
sides
composit of 4 different parts- under side of lobe, inferior margins of wing of nose, columna nasi and nares
base of nose
lowermost, scroll shaped bones on side walls of nasal cavity
inferior nasal concha
width of base of nose =
1 eye width
length of nose =
1/3rd lenght of face
