NUR 245 Exam 4 Flashcards
What are the functions of the MSK?
Support body
Protection (organs)
Movement
Hematopoiesis (RBC formation in bone marrow)
Storage for minerals
What influences muscle mass?
- size and strength: genetics, nutrition, exercise,
- neurological: nerves
- sex: males usually have more
Bones - structure (3 kinds) and function
structure:
1. compact - shaft and outer layer
2. cancellous bone - center and ends of the bones (spongy bone) –> short, flat, irregular, long
3. long bones - hollow, filled w/ bone marrow (break = risk for blood clot and obstructed blood flow)
function: support and protection ; site of hematopoiesis (formation of WBC, RBC, and platelets) ; stores minerals (calcium and phosphorus)
Muscles - structure and function
Structure: fibers in bundles (fasciculi = bundles of muscle fibers)
Function: generates force and movement, provides shape, produces body heat (movement)
Connective Tissue - function
cartilage
ligaments
tendons
fascia
cartilage: lets bone slide over each other = decreases friction / damage, absorbs shock
ligaments: connect bone to bone, stabilizes joints and limits movement
tendons: connects muscle to bone
fascia: flat sheets, attached muscles to bone, provides structure to nerves, blood vessels, and lymphatic
Flexion
bending a limb at joint
Extension
straightening a limb at a joint
Abduction
moving away from body
Adduction
moving toward the center of the body
Pronation
turning palm down
Supination
turning palm up
Circumduction
moving arm in a circle around shoulder
Inversion
moving the foot IN toward the middle of body
Eversion
moving the foot out from body
Rotation
moving the head around a central axis (saying no)
Protraction
moving body part forward (moving bottom of the jaw forward)
Retraction
moving body part backward (pushing chin back)
Elevation
raising of body part
Depression
lowering of body part
What is a joint?
functional unit of the MSK; permits mobility
What is a joint articulation?
where 2 joints come together = mobility
What are the 3 types of joints?
Fibrous
Cartilaginous
Synovial
Fibrous joint - what is it? and example
- synarthrotic, immoveable (think it’s a sin to not move)
- bones are connected with fibrous tissue
- example: cranial sutures
Cartilaginous joint - what is it? and example
- amphiarthrotic, slightly movable (think amphibians can move a little on land and in water)
- example: ribs and sternum (costal cartilage)
Synovial joint - what is it?
- diarthrotic, freely movable (think when you die you can go wherever)
- named by the type of movement
- one bone is stable, other acts as an axis (movement)
What is a bursae?
fluid filled space between tendons, ligaments, or bones that reduces friction
What is a synovial fluid?
lubricant in joint cavity, provides nutrients
Pivot joint - example
C1/atlas and C2/axis
Ball and socket joint - example
Hip and shoulder
Hinge joint - example
Elbow, knee, TMJ, wrist
Saddle joint - example
Thumb
Condyloid joint - example
wrist
Gliding joint - example
intravertebral
Plane joint - example
tarsal bones
TMJ - what is it? function?
Temporal - mandible joint
Hinge joint
function: speaking and chewing
TMJ - landmarks
- depression in front of the tragus
- external auditory meatus
TMJ - motions
hinge: open and close jaw
protraction and retraction: forward and backward motion
excursion: side-to-side movement (lower jaw)
Spine - how many bones in each section?
Cervical (7)
Thoracic (12)
Lumbar (5)
Sacral (5 - fused)
Coccyx (3)
Intervervetral discs - structure and function
structure: fibrocartilage, make up 1/4 of the length of each column
function: shock absorbers
Spine - landmarks (4)
C7 and T1: spinous process
T7 and T8: inferior angle of the scapula is @ interspace
L4: imaginary line of highest points in iliac crest
Sacrum: superior iliac spines
Spine: movements
Flexion: bending forward
Extension: bending backward
Abduction and rotation: to each side
Glenohumeral joint - what is it?
articulation of humerus and glenoid fossa of the scapula
ball and socket joint
Rotator cuff - what is it? function?
encloses the glenohumeral joint and covers the head of the humerus
Function: rotates arm laterally and stabilizes the head of the humerus in glenoid fossa of scapula
What are the 4 muscles of the rotator cuff?
(think SITS)
S: supraspinatus
I: infraspinatus
T: teres minor
S: subscapularis
Shoulder joint - landmarks
- acromion process: very top of the shoulder, little bump
- greater tubercle: below acromion process
- coracoid process: anterior, bump on the front of the shoulder
- subacromial bursa: abduction of arm so greater tubercle can move easily under acromion process
Shoulder joint - movements
flexion and extension
internal and external rotation
abduction and adduction
Ischial tuberosity (hip) - landmarks
under glute, can feel when hip is flexed
Greater trochanter (hip) - landmarks
width of palm below glute, feel when standing, flat depression under lateral side of the thigh
MSK Considerations of pregnant woman
- Increased hormones = increased mobility in joints (estrogen, relaxin, and corticosteroids)
- sacroiliac, sacrococcygeal, and symphysis pubis joints = changes in posture
- lordosis - exaggerated lumbar curve = increased back strain
MSK Considerations for aging adult
- osteoporosis = loss of bone density (minerals) –> increased risk for fractures (women and over 40 y/o at greater risk) –> need more vit D and C supps
- postural changes: height decreases, kyphosis w/ flexion of hips and knees
- fat distribution: subcutaneous fat does to abdomen and bony prominences are more pronounced, muscles mass loss/atrophy = weakness
- sedentary lifestyle = increases MSK loss
What are the urgent MSK assessments?
- FOCI: identify specific prob, alleviating pain, preventing complications
- GALS locomotor screening (11 tasks): gait, arms, legs, spine
What should we educate patients on regarding osteoporosis and prevention?
calcium and vitamin D supplements
- limit caffeine = causes increased excretion of calcium
- weight bearing exercises (fast walking!!)
- avoid smoking and alcohol
- bone density tests and meds
What is FRAX? and what do we screen for with it?
fracture risk assessment tool
used for low bone mass density (BMI, sex arthritis, smoking, steroids, alcohol, femoral neck BMD)
How should a nurse conduct the MSK assessment?
In an orderly approach:
- head to toe
- proximal to distal
- from midline outward
(compare bilaterally, note normal and abnormal)
What is the order of the MSK assessment?
- inspect
- palpate
- ROM
- muscle strength