ALL Flashcards
Anatomical Planes
Coronal/Frontal: anterior and posterior
Sagittal: left and right parts (median sagittal plane equally divides body)
Transverse/Horizontal/Axial: superior and inferior
Anatomical Location
Anterior/Ventral:front Posterior/Dorsal: back Medial: toward middle Lateral: away from middle Superior/Rostral/Cranial: toward head Inferior/Caudal: toward tail
Abduction vs. Adduction
Abduction: away from midline
Adduction: toward midline
Proximal vs. Distal
Being closer or farther from a structures origin
Axial Skeleton
Vertebral column
Skull
Ribs
Sternum
Appendicular Skeleton
Upper extremity and shoulder girdle (clavicle and scapula)
Lower extremity and pelvic girdle (fixed rigidly to sacrum)
Joints
Site where 2 skeletal elements come together. There are two categories: SYNOVIAL JOINTS (skeletal elements separated by a cavity) and SOLID JOINTS (no cavity; components are held together by connective tissue).
Synovial Joints
- Basic Characteristics
- Examples
- Range of Motion
Most common and most important clinically.
Bones connected via a fibrous tissue articular capsule that connects and encloses the articulating bones forming a joint CAVITY; contains a synovial membrane, which encloses the articular cavity.
Examples: shoulder joint, hip joint, acromioclavicular joint.
Range of motion: large range of movement between the articulating bones
Solid Joints
Connections between skeletal elements where the adjacent surfaces are linked together either by fibrous connective tissue or by cartilage. Movements are more restricted than in synovial joints.
Types:
1) Fibrous Joints
2) Cartilaginous Joints
Fibrous Joints
- Basic Characteristics
- Examples
- Range of Motion
Bones directly united by fibrous tissue
Examples: Sutures of the skull, interosseous membranes
Range of Motion: Little or no movement
Cartilaginous Joints
- Basic Characteristics
- Examples
- Range of Motion
Bones connected by hyaline cartilage or fibrocartilage
Examples: Intervertebral disk, pubic symphysis
Range of Motion: slightly moveable, strong
Articular Capsule
Synovial Joints
The capsule consists of fibrous tissue that connects and encloses the two articulating bones forming a joint cavity
Capsular (Intrinsic) Ligaments
Synovial Joints
Specialized thickenings of parts of the capsule that form intrinsic ligaments responsible for support, stability and limiting joint movement
Articular Cartilage
Synovial Joints
This cartilage, composed of hyaline (most common) or fibrocartilage, covers the surfaces of the articulating bones. The articular cartilage provides a wear-resistant, lubricated surface that reduces friction and wear-and-tear of the bones.
Synovial Membrane
Synovial Joints
Lines all inner surfaces of the joint cavity, except the surfaces of the articular cartilage. The membrane secretes a small amount of synovial fluid that lubricates all structures of the joint.