Chapter 3: General Anatomy and Radiographic Positioning Terminology Flashcards
Plane that transects the pelvis at the top of iliac crest at the level of fourth lumbar spinous process. It is used in the positioning of lumbar spine, sacrum and coccyx.
Interiliac plane
Plane that formed by biting surfaces of the upper and lower teeth with the jaws close. It is used for posing odontoid process and some head projections.
Occlusal plane
Mastoid tip
C1
Gonion, angle of mandible
C2, C3
Hyoid bone
C3, C4
Thyroid cartilage
C5
Vertebra Prominens
C7, T1
Approximately 2inches (5cm) above the level of jugular notch
T1
Level of jugular notch
T2, T3
Level of sternal angle
T4, T5
Level of inferior angle of scapulae
T7
Level of Xiphoid process
T9, T10
Inferior costal margin
L2, L3
Level of superior aspect of iliac crest
L4, L5
Level of ASIS
S1, S2
Level of symphysis pubis and greater trochanter
Coccyx
Heart: axis nearly transverse Lungs: short, apices at or near clavicles Diaphragm: high Stomach: high, transverse, and In the middle Colon: around periphery of abdomen Gallbladder: high, outside, lies more parallel
Characteristics
Build: massive
Abdomen: long
Thorax: short, broad, deep Pelvis: narrow
Hypersthenic - 5%
Heart: moderately transverse Lungs: moderate length Diaphragm: moderately high Stomach: high, upper left
Colon: spread evenly; slight dip In
transverse colon
Gallbladder: centered on right side, upper abdomen
Characteristics
Build: moderately heavy Abdomen: moderately long Thorax: moderately short, broad,
and deep
Pelvis: relatively small
Sthenic (50%)
The organs and characteris tics for this habitus are intermediate between the sthenic and asthenic body habitus types. This habitus is the most difficult to classify.
Hyposthenic (35%)
Heart: nearly vertical and at midline Lungs: long, apices above clavicles, may be broader above base Diaphragm: low Stomach: low and medial, in the pelvis when standing Colon: low, folds on itself Gallbladder: low and nearer the midline
Characteristics
Build: frail Abdomen: short
Thorax: long, shallow Pelvis: wide
Asthenic (10%)
Bones in Axial Skeleton
80
Bones in appendicular skeleton
126
All bones are com posed of a strong, dense outer layer called the ________ bone and an inner portion of les dense ______ bone.
Compact bone
Spongy bone
The softer spongy bone contains a peculated network of interconnecting spaces called the
trabeculae
* filled with red and yellow marrow.
______ marrow produces red and white blood cells, and _______ marrow stores adipo e (fat) cells.
Red marrow
Yellow marrow
Long bones have a central cavity called the __________, which contains trabeculae filled with yellow marrow.
Medullary cavity
A tough, fibrous connective tissue called the __________ covers all bony surfaces except the articular surfaces, which are covered by the articular cartilage.
Periosteum
The tissue lining the medullary cavity of bone is called the
endosteum
is the term given to the devel opment and formation of bones.
Ossification
* Osification occurs separately by two distinct processes:
intermembranous ossification - develop from fibrous membrane
endochondral ossification - develop from hyaline cartilage
As growth occurs, a plate of car
tilage called the _________ develops between the two areas. This
plate is seen on the long-bone radiographs
of all pediatric patients. It is important radio
graphically because it is a common site of
fractures in pediatric patients.
Epiphyseal plate
Fibrous classification with movements
1 . Syndesmosis - slightly movable
- Suture - immovable
- Gomphosis - immovable
Cartilaginous classification and movement
- Symphysis - slighly movable
2. Synchondrosis - immovable
Synovial classification and movements
- Gliding - all freely movable
- Hinge
- Pivot
- Ellipsoid
- Saddle
- Ball and socket
Inferior tibiofibular joint
Syndesmosis
Roots of the teeth on the alveolis
Gomphosis
Synarthroses
immovable joint
Amphiarthroses
slightly movable
Diarthroses
Freely movable
Do not have a joint cavity. They are united by various fibrous and connective tissues or l igaments. These are the strongest joints in the body because they are virtually immovable.
Fibrous joints
they do not have a joint cavity, and they are virtually immovable. Hyaline cartilage or fibrocartilage unites these joints.
Cartilaginous Joints
the epiphyseal plate found between the epiphysis and diaphysis of a growing long bone
Synchondrosis
They act as shock absorber by con forming to and filling in the large gaps around the periphery of the bones.
Menisci
help reduce friction between skin and bones, tendons and bones, and muscles and bones.
Bursae
intercarpal joints of the wrist
Gliding
Elbow joint
Hinge joint
Atlas and axis of the CS
Pivot
Radiocarpal joint of the wrist
Ellipsoidal
Carpometacarpal joint
Saddle
Hip joint
Ball and Socket
Rounded process at an articular extremity
condyle
Fracture in which the bone retain its normal alignment
Nondisplace fracture
More serious fracture in which the bones are not in anatomic alignment
Displace fracture