Final Exam Flashcards
Sagittal plane/medial-lateral axis
Flexion
Extension
Frontal plane/anterior-posterior axis
Abduction
Adduction
Transverse plan/vertical axis
Internal rotation
External rotation
Open Kinematic Chain
Distal on proximal
Closed Kinematic Chain
Proximal on distal
1st Class Lever
Fulcrum btwn resistance force & effort force
MA → >1, <1, =1
2nd Class Lever
Fulcrum located @ 1 end
MA > 1
Designed for power
3rd Class Lever
Fulcrum located @ 1 end
MA < 1
Designed for ROM & speed
Coupling Patterns
Cervical
- lateral flexion & ipsilateral rotation
- rotation & ipsilateral lateral flexion
Thoracic
- none
Upper lumbar
- lateral flexion & contralateral rotation
Lower lumbar
- lateral flexion & ipsilateral rotation
Uncinate Processes form […] w/inferolateral part of […] to increase […]
Uncovertebral Joints
Superior vertebral body
Stability
Z joints made by articulating […] & […]
Inferior articular process
Superior articular process
Cervical IV Disc
- AF is thick anteriorly & tapers posteriorly
- Less NF bc its not bearing as much weight
- Manage compressive forces
Cervical Z Joint
Horizontally oriented → can manage more loads
Vertically oriented → cant manage compression well
More load w/ extension
Tectorial Membrane
Superior extension of PLL
Limits flexion
Helps maintain SC space
Cruciform Ligaments
Hugs odontoid to atlas
Thickest ligament in spine
Limits flexion
O-A Flexion
Posterior glide of occiput on atlas
Anterior glide of atlas on occiput
O-A Extension
Anterior glide of occiput on atlas
Posterior glide of atlas on occiput
A-A Joint
Most mobile segment of spine
Rotation >30° impacts contralateral vertebral artery
Rotation > 45° impacts ipsilateral vertebral artery
Cervical Spine Stability
- Most load bearing through discs & body anteriorly
- Most stability from muscles
- Ligaments stabilize @ end range
Lower Cervical Flexion
Anterior & superior movement of superior facet
Limited by Z joint capsule
Larger IV foramen, smaller canal
Lower Cervical Extension
Posterior & inferior glide of superior facet
Limited by ALL
Smaller IV foramen, very small canal
Lower Cervical Lateral Flexion
Compress ipsilaterally
Elongate contralaterally
Limited by contralateral ligaments & muscles
Lower Cervical Protrusion
Lower cervical flexion
Upper cervical extension
Lower Cervical Retraction
Lower cervical extension
Upper cervical flexion
Lateral Flexion to R in C spine
Extension on R
Flexion on L
Rotation to L in C spine
Extension on L
Flexion on R
Costoclavicular Ligament
Inferior part of clavicle to 1st rib
Taut w/shoulder elevation & protraction
Anterior & Posterior Sternoclavicular Ligament
From sternal end of clavicle to A/P surfaces of manubrium
Limit anterior & posterior movement of clavicle
Interclavicular Ligament
Runs from superior aspect of medial clavicles
Help stabilize superior part of joint
Sternoclavicular Joint Movements
Elevation/depression
Protraction/retraction
Long axis rotation of clavicle
Acromioclavicular Joint
- Clavicle is convex, acromion is concave
- Joint line curved so acromion can glide anterior/posterior
- Fibrocartilaginous disc
- Stability → coracoclavicular ligament
Acromioclavicular Joint Movements
- Gliding as shoulder flexes & extends
- Elevation/depression to conform w/scapula & humerus abduction
Coracoclavicular Ligament
- Conoid portion → limits upward movement of clavicle on acromion
- Trapezoid portion → prevent clavicle from overriding acromion
- Primary restraint of scapula moving inferior on thorax away from clavicle
- Critical to vertical stability of scapula
Scapulothoracic Joint
- Scapula rotated anteriorly → IR position
- Scapula titled anteriorly & upwardly rotated
- Fxn → ↑ shoulder motion & allow lever for small muscles
W/O scapular motion shoulder elevation limited to […]
120°
Upward Rotation of Scapula
Upper & lower trap
Serratus anterior
Downward Rotation of Scapula
Rhomboid major & minor
Lats
Levator scapulae
Scapular Retraction
Middle trap
Rhomboid major & minor
Lats
Scapular Protraction
Serratus anterior > pec minor
Glenoid Labrum
- Fibrocartilaginous
- Thicker anteriorly
- Deforms to accomodate HH position changes
- Protects GF, assists in lubrication, deepens concavity
GH Joint Capsule
From margin of GF to neck of humerus
Loose to allow joint surfaces to separate
Small contribution to stability
Superior GH Ligament
Prevent inferior displacement of HH
W/superior capsule resists gravity
Middle GH Ligament
Stabilizes joint anteriorly
Limits ER
Inferior GH Complex
- Anterior band → moves superior to HH w/elevation
- Axillary pouch → allows movement of HH in upper ranges of elevation
- Posterior band → moves superior to HH w/elevation
- Tightens w/elevation to encourage ER
Weak areas in GH Joint
- Inferior capsule
- Anterior-inferior aspect least resistant to tension
Coracohumeral Ligament
- Attaches to greater & lesser tuberosity
- Stabilizing w/UE in dependent postion
- Protects from superior trauma & upward dislocation
Rotator Cuff
Compress HH into GF
Small depression of HH during active elevation
Triangular Fibrocartilage Complex
- Space btwn distal ulna & ulnar side of carpal bones
- important during pronation/supination
- injured during pronation, supination, extension
Muscles attaching distally on ulna
Flex/extend elbow
Muscles attaching distally on radius
Flex/extend elbow
Pronation/supination
Elbow Flexors
Biceps
Brachioradialis
Pronator teres
FCR
FCU
Elbow Extensors
Anconeus
Triceps
Elbow Pronators
Pronator teres
Pronator quadratus
Elbow Supinators
Biceps brachii
Supinator
Radiocarpal Joint
radius articulates w/scaphoid & lunate
Carpals & Metacarpal Articulations
1st → trapezium
2nd → trapezoid
3rd & 4th → capitate
4th & 5th → hamate