Musculoskeletal (Exam 3) Flashcards
Structure of MSK
bones (206), joints, muscles
5 types of connective tissue
MSK Function
support
movement
protection
manufacturing RBCs
reservoir for storage of essential materials
Bone
made of organic matrix and strengthened by deposits of calcium phosphates
continuous cellular remodeling
compact and cancellous
Compact (Cortical) Bone
hard outer layer, dense and tough
Cancellous (Trabecular) Bone
spongy inner layer, light and less dense
Muscle
600, account for 40-50% of body weight
movement is produced through muscle contraction
skeletal, smooth, cardiac
Skeletal Muscle
voluntary! primary focus of MSK
produce movement across a joint
composed of bundles of muscle fibers called fasciculi
muscles are connected to bones by tendons
Joints
site of articulation/union of 2+ bones
functional unit of MSK
allow for mobility which is needed for ADLs
synovial and nonsynovial
Synovial Joints
freely moveable
bones are separate from each other and enclosed in joint cavity
surface of bones within joint cavity are lined with resilient cartilage and are avascular
joint cavity is lined with synovial membrane
surrounded by fibrous capsules and are supported by ligaments
Synovial Membrane
secretes synovial fluid which provides nourishment
Types of Synovial Joints
swivel/pivot joints
ball and socket
hinge
saddle
planar/gliding
condyloid
Types of non-synovial joints
fibrous
cartilaginous
Fibrous joints
immovable
united by interjacent fibrous tissue or cartilage
Cartilaginous joints
slightly moveable
separated by fibrocartilaginous discs
Connective tissues
tendons
ligaments
cartilage
bursae
meniscus
fascia
Tendons
connect muscle to bone
ex. achilles tendon to calcaneus
Ligaments
connect bone to bone
ACL, PCL, MCL, LCL (knee ligaments)
Cartilage
allows bones to slide over one another
reduces friction
prevents damage
absorbs shock
Bursae
fluid-filled sacs in areas of friction, found within synovial joints
acts as a cushion for bones
located in knee, shoulder, elbow, hip
Meniscus
cartilaginous disc between bones
acts as a cushion and absorbs shock
Fascia
flat sheets that line and protect muscle fibers
also attach muscle to bone
provides structure for nerves
Flexion
bending the limb at the joint
decreasing the angle between bones
brings bones together
Extension
straightening of the limb at the joint
increases the angle between bones
zero degrees
Rotation
turning of a joint around an axis
Lateral Flexion
lateral movements in the frontal plane
Abduction
movement away from the center of the body
Adduction
movement toward the center of the body
Circumduction
conical movement of limb extending from the joint at which the movement is controlled
combines flexion, extension, abduction, adduction
Inversion
movement of the sole towards the median plane so that the sole faces in a medial direction
Eversion
movement of the sole away from the median plane so that the sole faces in a lateral direction
Protraction
movement of body part forward and parallel to the ground
Retraction
movement of the body part backward and parallel to the ground
Elevation
raising a body part
movement in a superior direction
Depression
lowering a body part
movement in an inferior direction
Opposition
approximation of the thumb and 5th digit
Pronation
turning the forearm so the palm is down
Supination
turning the forearm so the palm is up
Dorsiflexion
dorsum of the foot
flexion of the ankle
Plantar flexion
plantar aspect of foot
extension of the ankle
step on the gas
Subjective Data: Past Medical History
fractures
injuries
falls
degenerative disease
stroke
infections
parathyroid problems
tumors/cancer
Subjective Data: Past Surgical History
joint replacement (ORIF, TKA)
surgical repair (ACL, meniscus)
spinal surgery
Subjective Data: Family History
any immediate family members with muscle, joint, or bone problems
autoimmune conditions
Subjective Data: Joints
pain
stiffness
swelling
heat
redness
limitation of movement
Subjective Data: Muscles
pain (cramps)
spasm
weakness
Subjective Data: Bones
pain
deformity
trauma (fractures, dislocations, sprains/strains)
Katz Index
used for ADLs
6=high (patient independent)
0= low (patient very dependent)
Localized Pain
monoarticular
trauma
Diffuse Pain
polyarticular
migratory
pattern of involvement