INCOMPLETE: Muskoloskeletal (Grant) Flashcards
4 class of bones
- Long (extremities)
- Short (hands/feet)
- Flat (skull/sternum)
- Irregular (vertebrae)
Fx of skeletal system
- support
- protection
- movement
- mineral storage (Cal, Phos)
- hemopoiesis (RBC formation in bone marrow @ end of long bones)
Articulations (Joints)
-allow movement
Articulations (joints): 3 types
- Synarthrosis (no mvmt)
- Amphiarthrosis (slight mvmt)
- Diarthrosis (free mvmt)
Ariticultions: Division of Skeleton
- Axial skeleton (skull/vertebral col; thorax)
- Appendicular skeleton (upper/lower extrem)
- shoulder/pelvic girdle
bones held together by ?
connective tissue
joint is the point of contact btwn
individual bones
-every bone in body connects or articulates with at least one bone in body, except 1 (hyoid bone, anchors tongue)
Fx of Muscular System
- motion (result of contraction and relaxing individual muscles)
- maintenance of posture (contraction of certain skeletal muscles w exert a pull on various bones to maintain posture of sitting an/or standing)
- production of heat (as muscles contract, they produce 85% body heat)
- there are over 600 muscles
3 Fx of Muscles
when muscles contract they form 3 actions; Motion, Posture, Heal?
Skeletal Muscle Structer
- Epimysium (connective tissue surrounding skel musc)
- Perimysium (inner covering join along w epimysiuman extend beyond muscle to form touch hard of connect tissue called TENDONS)
- Endomysium (wispy layer of areolar connective tissue that ensheaths each individual myocyte (muscle fiber, or muscle cell). It also contains capillaries and nerves.
Nerve and Blood supply
- BVs provide constant supply of O2 and nutrition,
- Nerve cells/fibers supply constant source of information
Muscle Contraction
- upon stimulation
- skeletal muscles are in constant state of readiness for action
Types of Body movements
- flexion (sm angle at joint, bending knee)
- extension (open angle btwn adjoining bones)
- abduction (away from midline, open legs)
- adduction (toward middle)
- rotation (mvt of bone around it longintudinal access. pivot motion)
- supination (palms up)
- pronation (palm down)
- dorsiflexion (flex foot)
- plantar flexion (extend foot)
Dx Tests
RADIOGRAPH
- Myelogram (radiopaque dye into lumbar spine)
- Nuclear scan (record images using radioactive tracer in arm, isotopes w NOT affect visitors, need signed CONSENT)
- MRI (magnetic Resonance imaging)
- CT, Computed Axial Tomography (need signed CONSENT, clearer, 3D)
- Bone Scan (mets, inflam bone disease)
ENDOSCOPIC EXAM
- Arthroscopy
- Endoscopic spinal microsurgery
NI:
need signed consent
Myelogram
inject radiopaque dye into lumbar spine (herniated disc, tumor) assess for Iodine or shellfish allergy. If alergic, use non-ionic dye or steroids/anithistamine prior to dye (for low - min reaction