Musculoskeletal System Flashcards
What is the purpose of the Musculoskeletal System? (5)
(1) for support to stand erect
(2) for movement.
(3) The musculoskeletal system also functions
to encase and protect the inner vital organs (e.g., brain, spinal cord, heart)
(4) to produce the red blood cells, white blood cells, and platelets in the bone marrow (hematopoiesis)
(5) as a reservoir for storage of essential minerals such as calcium and phosphorus in the bones.
What is the role of cartilage?
allow bones to slide, absorb shock
What is the role of tendons?
muscles to bones
What is the role of ligaments?
bone to bone; stabilizes joint
What is the role of bursae?
Fluid filled to cushion bones
What is the role of fascia?
flat sheets that protect muscle fibers; taper to form tendons
What are synovial joints?
freely movable (most common)
What are cartilaginous joints?
slightly moveable
What are fibrous joints?
immoveable
What are joints?
Where two bones come together
What are some examples of non-articular structures?
- Bursae
- Tendons
- Muscles
- Ligaments
- Fasciae
- Nerves
- Bones
- skin
What are some examples of Articular structures?
- Synovium and synovial fluid
- Cartilage
- Ligaments
- Juxta-articular bone
- Joint capsul
What is the role of the temporomandibular Joint?
Permits:
- Opening/closing of the jaw
- Protrusion and retraction
- Side to side gliding movement of the lower jaw
What is the role of the glenohumeral joint: Shoulders
ball and socket joint
- Flexion and extension
- Abduction and adduction
- Rotation
- Circumduction
What is the role of the humeroradial Joint: Elbow
- Articulation of the humerus, radius, and ulna
- Permits flexion and extension
- Pronation and supination
What is the role of tibiofemoral joint: Knees
- Femur, tibia, and patella
-Cruciate and collateral ligaments - Bursa
- Flexion and Extension
What is the role of the Acetabulofemoral Joint: Hip
- Ball and Socket
- Wide ROM
What is the role of the tibiotalar joint: Ankle and foot
- Tibiotaler Joint: Hinge
(Dorsiflexion & Plantar Flexion) - Subtalar Joint
(Inversion & Eversion) - Metatarsophalangeal and IP Joints
(Flexion, extension, abduction, adduction of toes)
What is the radiocarpal Joint: wrists and carpals
- Radiocarpal joint
- Intercarpal Joints
- Interphalangeal joints
- Felxion, Extension, ulnar and radial deviation of wrist
What are skeletal muscles?
Voluntary muscles (under conscious control)
What are smooth muscles?
involuntary muscle (autonomic nervous system)
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
Adduction
Moving a limb toward the midline of the body
Pronation
Turning the forearm so the palm is Downwards