Exam 4 - Musculoskeletal System Flashcards
Function of the musculoskeletal system
Support - to stand erect Movement Protect inner organs Produce blood cells Reservoir - stores essential minerals
Immovable joints
Fibrous
Example of a fibrous joint
Sutures of skull
Joints that are separated by fibrocartilaginous discs and are only slightly movable
Cartilaginous joints
Freely movable joints
Synovial joints
Components of a synovial joint
Joint cavity lined with synovial membrane Synovial fluid Cartilage Surrounded by fibrous capsule Supported by ligaments
What do ligaments connect?
Bone to bone
What is a bursa?
Enclosed sac filled with synovial fluid, much like a joint
Examples of areas with bursa
Shoulder
Knee
What do tendons connect?
Skeletal muscle to bone
What is flexion?
Bending a limb at a joint
What is extension?
Straightening a limb at a joint
What is abduction?
Moving a limb away from the midline of the body
What is adduction?
Moving a limb toward the midline of the body
What is pronation?
Turning the forearm so the palm is down
What is supination?
Turning the forearm so the palm is up
What is circumduction?
Moving the arm in a circle around the shoulder
What is inversion?
Moving the sole of the foot inward at the ankle
What is eversion?
Moving the sole of the foot outward at the ankle
What is rotation?
Moving the head around a central axis
What is protraction?
Moving a body part forward and parallel to the ground
What is retraction?
Moving a body part backward and parallel to the ground
What is elevation?
Raising a body part
What is depression?
Lowering a body part
How many cervical vertebrae?
7
How many thoracic vertebrae?
12
How many lumbar vertebrae?
5
How many sacral vertebrae?
5
How many coccygeal vertebrae?
3 or 4
Where is the spinous process?
C7 and T1 - base of neck
Where is the inferior angle of the scapula?
Interspace between T7 and T8
Imaginary line connecting the highest point on each iliac crest crosses which vertebrae?
L4
An imaginary line joining the two symmetric dimples that overlie the posterior and superior iliac spines crosses where?
The sacrum
What happens if compression of a nucleus pulposus becomes too great?
The disc can rupture and the nucleus pulposus can herniate out of the vertebral column,
compressing on the spinal nerves and causing pain
Function of cartilage
Covers surface of opposing bones
What is bursitis
Inflammation of the bursa
Which joint, the shoulder or hip, has a wider range of motion?
Shoulder