11: Radiographic Anatomy - Bennett

Question 1

increased soft tissue attenuation and densities –>

Answer 1

swelling

Question 2

breaks in teh cortex –>

Answer 2

fracture, bone infection

Question 3

widening or decreasing of the joint space and alignment –>

Answer 3

infection

arthritis

Question 4

the talus is a passive bone. what does that mean?

Answer 4

talus will move in relation to calcaneus

body of talus is normally parallel with weight of supporting plane

Question 5

signs of a cavus foot

Answer 5

high arch
increased calcaneal inclination angle
posterior break in cyma line
bullet hole sign

Question 6

signs of pronanted foot type

Answer 6

decreased angle of calcaneus
lowered arch
anterior break cyma line

Question 7

calcaneal inclination angle and talar declination angle are _____ proportional

Answer 7

inversely

Question 8

what joints are in the cyma line?

Answer 8

midtarsal articulations:

talonavicular jt
calcenocuboid jt

Question 9

when discussing a cyma line deformity, it is always in relation to …

Answer 9

talonavicular jt

b/c the calcaneocuboid jt is so stable that it does not move

Question 10

tarsometatarsal jt aka

Answer 10

lis franc’s jt

Question 11

plantar ligament from the medial cuneiform to the 2nd met base

Answer 11

lis franc’s ligament

Question 12

which bones don’t fuse until 25 years?

Answer 12

ilium
ischium
pubis

Question 13

where is the secondary center of ossification in calcaneus?

Answer 13

poseterior epiphysis

shows up 6-8 yo
fuses 14-16 yo

Question 14

time of appearance for primary ossification center

Answer 14

avg 3 yr

Question 15

only primary centers of ossification; foot bones

Answer 15

cuboid
medial cuneiform
intermediate cuneiform
lateral cuneiform

Question 16

which met has a secondary center of ossification at base?

Answer 16

first met

fuses 17-20 yo

2,3,4,5 met s all have head secondary centers of ossification

Question 17

where are the phalangeal secondary centers of ossification?

Answer 17

base

Question 18

small bones usually from a secondary ossification center that fail to unite with the remaining portion of the bone

Answer 18

accessory ossicles

may be confused w/ fx - check bilateral film; usually asymptomatic

Question 19

accessory navicular

Answer 19

os tibiale externum

Question 20

accessory cuboid

Answer 20

os peroneum

Question 21

failed fusion of the posterior process of the talus

Answer 21

os trigonum

may be confused with shepherd fracture

Question 22

often confused with a fracture of a sesamoid bone

Answer 22

bipartite sesamoid

Question 23

where do you look radiologically for hallux abducto valgus deformity?

Answer 23

space b/w 1st and 2nd met

increased IM angle –> changes position of hallux to abducted and valgus frontal plane change

Question 24

describe calcified vessel

Answer 24

tunica media

does not narrow the lumen

radiopaque