TEST 2 - Merrill's Positioning and Anatomy
Cards
Anterior aspect of scapula
Costal Surface
Deep depression on superior border
Scapular notch
Large protrusion on dorsal surface of scapula
Spine
Lateral extension of scapular spine
Acromion
Extends from the superior angle to the inferior angle
Medial border
Lage fossa at lateral angle
Glenoid cavity
The junction at the lateral and medial borders
Inferior Angle
the junction at the medial and superior borders
Superior angle
extends from the glenoid cavity to the inferior angle
lateral border
extends from the superior angle to coracoid process
Superior border
slender, fingerlike projection extending anteriorly and laterally from near the lateral angle
Coracoid process
large depression on the costal surface
subscapular fossa
area above the scapular spine on dorsal surface
supraspinous fossa
large broad area below spine on dorsal surface
infraspinous fossa
large rounded eminence of humerus that articulates with glenoid cavity
humoral head
constriction of shaft inferior to tubercles of humerus
surgical neck
narrow constriction of humerus superior to tubercles
anatomic neck
bony process on the anterior surface of shaft of humerus, inferior from the anatomic neck
lesser tubercle
bony process on the lateral surface of the humerus
greater tubercle
deep depression of humerus that seperates the two tubercles
intertubecular groove
scapularhumoral joint is what type
ball and socket
what is the name of the ridge of the scapular spine
crest
bone classification for scapula
flat
lateral end of clavicle
acromial
medial end of clavicle
sternal
clavicle articulates with what structures?
Manubrium of sternum(SC) and acromion of scapula (AC)
What classification of bone is clavicle?
Long Bone
At what level of the clavicle (in reference to the ribs)
horizontal oblique plane just above 1st rib
What classificatio of joint are the SC and AC joints?
Synovial
What type of joints are the SC and AC joints?
Gliding
Which gender of adults has more sharply curved clavicles?
Males
New tissue growth where cell proliferation is uncontrolled
tumor
transfer of a cancerous region from one area to another
metastases
form of arthritis marked by progressive cartilage deterioration in synovial joints and vertebrae
Osteoarthritis
increased density of atypically soft bone
Osteopetrosis
malignant tumor arising from cartilage cells
chrondrosarcoma
chronic systemic inflammatory collagen disease
Rheumatoid arthritis
How many surfaces, borders and angles does scapula have?
Surfaces 2, Borders 3, Angles 3
what bone forms the anterior part of the shoulder girdle
clavicle
small synovial fluid filled sacs that relieve pressure and reduce friction in tissue are called______?
bursae
Large depression on the costal surface
subscapular fossa
how many articulations does the shoulder girdle have?
3 --- SC, AC, SH joints
what type of movement do the articulations of the shoulder girdle have?
freely moveable (Synovial)
What type (functional) of joint are the joints of the shoulder girdle
AC - gliding, SC - double gliding, SH - ball and socket
Where should the central ray be be directed in AP Shoulder projection
perpendicular to a point 1" inferior to coracoid process
For AP projections for the shoulder the patient's respiration should be__________?
suspended
Which positioning maneuver puts the humeral epicondyles parallel to the IR
AP - External rotation
Which positioning maneuver puts the humeral epicondyles at 45 degrees to the IR
AP neutral rotation
Which positioning maneuver puts the humeral epicondyles perpendicular to the IR
AP - Internal rotation
Which projection of the shoulder shows the greater tubercle in profile?
AP - External rotation
Which projection of the shoulder shows the lesser tubercle in profile?
AP - Internal rotation
Which projection of the shoulder shows the outline of the lesser tubercle between the humeral head and greater tubercle in?
AP neutral rotation
the transthoracic lateral projection may be performed with patient upright or_______
supine
which change in techical factors should be used to aid the blurring of lung detail by the action of the heart when the patient is able to hold his or her breath for a sustained period?
Use low mA/long exposure time combination with the usual mAs factor
(Transthoracic Lateral projection) How many degrees and in which direction should the CR be directed if it cannot be directed perpendicular to IR because patient cannot elevate uneffected shoulder
10-15 degrees cephalad
T or F (inferosuperior axial projection) When the patient is recumbent, the IR should be placed in the bucky tray
False
T or F (inferosuperior axial) When the patient is recumbent, the head and upper torso should be elevated 3 inches
True
T or F (inferosuperior axial) When using a horizontally directed CR, the patient should be placed in a supine body position
True
(Inferosuperior axial) - Into which rotational position should the humerus be placed
external
(Inferosuperior axial) - how many degress should the CR be directed in the medial direction
15-30 degrees
(Inferosuperior axial) - what positioning factor determines how many degree the CR should be directed medially?
greater abduction-- greater angle (If patient can abduct 90 degrees then CR is at 30 degrees)
T or F (inferosuperior axial) - the coracoid should be seen pointing anteriorly
True
T or F (inferosuperior axial) - the greater tubercle should be seen in profile
False
T or F (inferosuperior axial) The scuplohumeral joint should be seen slightly overlapping
True
T or F (inferosuperior axial) The lesser tubercle should be in profile pointing anteriorly
True
T or F (inferosuperior axial) The AC joint, acromion and acromial end of clavicle should be seen through the humeral head
True
T or F (PA Scapular Y) The patient should be slightly rotated to the place the affected shoulder in contact with the IR
True
T or F (PA Scapular Y) In an image of a normal shoulder, the humeral head should be directly superimposed over junction of scapular Y
True
(PA Scapular Y) Breathing instructions
suspend
How much body rotation is necessary for PA Scapular Y?
45-60 degrees
(PA Scapular Y) With reference to the thorax, where should the scapular body be demonstrated in the image of the PA oblique projection?
along the lateral aspect, but not superimposed
(AP Oblique - Grashey) What is the correct amount of obliquity towards the affected side?
35-45 degrees
(AP Oblique - Grashey) The scapula should be perpendicular or parallel to the IR
parallel
(AP Oblique - Grashey) What is the proper arm position ?
abducted with slight internal rotation
(AP or PA clavicle) Breathing instructions
suspend at end of exhalation
(AP or PA clavicle) Which projection shows best recorded detail?
PA better because of reduced OID
T or F (AP or PA clavicle) Should demonstrate the entire clavicles free from superimposition with other bony structures
False
T or F (PA Scapular Y) Scapular body should overlap thorax
False
(PA Scapular Y) Evalution criteria
1. Acromion seen laterally and free of superimposition 2. Coracoid process superimposed on or slightly below clavicle
(PA Scapular Y) Humeral head in profile at Y. If humeral head is below coracoid process, then what type of dislocation is present?
Anterior dislocation
(PA Scapular Y) If humeral head is displayed below acromion, then what type of dislocation is evident?
posterior dislocation
(AP Oblique - Grashey) What should be in profile?
Glenoid cavity
(AP Oblique - Grashey) How should the joint space appear?
open between humeral head and glenoid cavity
(AP or PA Axial clavicle) What angle should the CR be directed?
0-15 supine, 15-30 prone
(AP or PA Axial clavicle) breathing instructions
Suspend at end of full inspiration to further elevate angle of clavicle
(AP or PA Axial clavicle) Most of clavicle projected above ribs and scapula with the medial end overapping which ribs?
first or second
(AP or PA clavicle) Evaluation: Lateral half of clavicle above scapula, with the medial half superimposing thorax at which ribs?
between 3-5
(AP or PA Axial clavicle) What CR angle should you use on a thinner patient in a supine position
30 degrees. less for a heavier patient
(AP axial clavicle) CR angulation
15-30 degrees cephalad
(PA Axial clavicle) CR angulation
15-30 degrees caudad
(AP Scapula) CR placement
Perpendicular to a point 2" inferior to coracoid
(AP Scapula) Breathing instructions
slow breathing
(AP Scapula) Which scapular border should be seen free from superimposition with the ribs?
lateral border
T or F (AP Scapula) Images should demonstrate the area of the scapula, including glenoid cavity and coracoid process with superimposition of the ribs
True
(AP Scapula) Images should demonstrate the acromion process and the ___________angle
inferior
(Lateral Scapula) When the arm is placed over the head, which area of the scapula is of interest?
The Body
(Lateral Scapula) What is the arm placement when you wish to demonstrate the acromion and corocoid
place arm on upper chest grasping opposite shoulder
(Lateral Scapula) CR placement
perpendicular to midmedial border of protruding scapula
(PA Scapular Y) CR Placement
crest of spine, exiting scapulohumeral joint
(Lateral Scapula) Images should demonstrate which borders superimposed?
lateral and medial
(Lateral Scapula) The __________process and _________angle should be demonstrated
acromion; inferior
Which borders unite to form the superior angle?
Medial and superior
Which borders unite to form the inferior angle?
medial and lateral
(Transthoracic Lateral projection) breathing instructions
suspended full inspiration
In which body position should the patient be placed the demonstrate the left shoulder with the PA Oblique (Scapular Y)?
LAO
Which projection of the shoulder joint requires the patient to be rotated until the midcoronal plane forms an angle of 45-60 degress with the plane of the IR?
PA Oblique (Scapular Y)
What would be the required patient position to demonstrate left shoulder using AP Oblique (Grashey method)?
35-45 degrees LPO
The foot contains _____ bones?
26
How many phalanges does the foot contain?
14
How many tarsals of the foot?
7
tarsals
Calcaneus
calcaneus, talus, navicular, cuboid, medial cuneiform, intermediate cuneiform, lateral cuneiform
Tarsals
Largest tarsal bone
Calcaneus
Second largest tarsal
Talus
Talus articulates with:
tibia, fibula, calcaneus, navicular
position of the talus
most superior position of foot
Cuboid position
lies on lateral side of foot between calcaneus and 4th and 5th metatarsals
Navicular position
lies on medial side of foot between talus and three cuneiforms
Largest cuneiform
medial cuneiform
smallest cuneiform
intermediate cuneiform
Metatarsophalangeal joints are _______type
ellipsoidal
The tarsal joints are _________type
gliding
the interphalangeal joints are ______type
hinge
The ankle mortise contains which two joints?
talofibular and tibiotalar
The cuboidonavicular joint is ________type
syndesmosis (slightly moveabl
The ankle joint is also called the ________
ankle mortise
The ankle joint is also called the ________
ankle mortise
The ankle mortise is formed by articulations of the------------?
lateral malleolus of fibula and medial malleolus of tibia
The foot is divided into what three parts for descriptive purposes
forefoot, midfoot, hindfoot
The hindfoot contains:
talus and calcaneus
The midfoot contains:
3 cuneiforms, navicular, cuboid
The forefoot contains:
metatarsals and toes
What are the names of the arches of the foot?
longitudinal (shock absorber) and transverse (assists in supporting longitudinal arch
Tarsal bone classification
SHORT
The Great toe joint
Interphalangeal joint
Which tarsal bone articulates superiorly on the calcaneus
Talus
(AP Axial Toes) CR angulation
15 degrees
(AP Axial Toes) CR placement
3rd MTP joint
(AP Axial Clavicle) CR Angulation - Upright
15-30 DEGREES CEPHALIC
(AP Scapula) Part position
Abduct arm and flex elbow, center affected scapula to grid
(Lateral Scapula) CR placement
Perpendicular to mid medial border of scapula
Dancer's (Jones) fracture
evulsion fraction of the base of the fifth metatarsal
Pott's Fracture
evulsion fracture of the medial malleolus with loss of the ankle mortise
(Scapular Y PA Oblique) CR placement
perpendicular to scapulohumeral joint or crest of spine of scapula
(Lateral Scapula) CR placement
Mid medial border of scapula
(AP Scapula) CR placement
perpendicular to point approx. 2" inferior to coracoid process
(AP Scapula) Breathing instructions
slow breathing to obliterate lung detail
(AP, Oblique, Lat Toes) IR size
8x10

