Exam Flashcards
Workplace Related Injuries
Soft tissue 28.6%
Trauma to muscle and tendon 20.6%
Trauma to joints and ligaments 14.1%
Trauma to muscle 6.9%
Dislocations 2.6%
Causes of Workplace Related Injuries
Repetitive Motion - 63%
Placing, grasping or moving objects - 20%
Repetitive use of tools - 8%
Typing/key entry - 9%
Manual Handling - Lifting Techniques
- Keep load close to the body and use thigh muscle.
- Never attempt loads if you think they’re too heavy.
- Pushing is stress then pulling
- Use mechanical aids or help with heavy loads
- Organise work area to minimise bending, twisting and stretching
- Take frequent breaks
- Cool down after heavy work with gentle, sustained stretches
- Improve your fitness
- Warm up cold muscles with gentle stretching
Cervical Spine
- 7 vertebrae
- C1, C2 & C7 atypical
- Coupled and double-jointed movements
- Bifid spinous process
- Superior & inferior articular facet:
*Covered in articular cartilage to allow
smooth movement
Atypical Cervical Vertebra
C1:
- Posterior tubercle instead of spinous process.
C2:
- Has dens
C7:
- Elongated and non-bifid spinous process
Anterior Longitudinal Ligament
- Fibrous tissue thar runs on the ventral aspect of vertebral bodies along the entirety of the spinal column
- Restricts Extension
Posterior Longitudinal Ligament
- Fibrous tissue that runs on the posterior aspect of vertebral bodies along the entirety of the spinal column
- Restricts Flexion
Ligamentum Flavum
- Connects between lamina of vertebrae (from C2-S1)
- Helps preserve upright posture
- Resists excessive separation between lamina, and prevents buckling of the ligament into the spinal canal which would cause compression.
Interspinous Ligament
- Connect adjacent spinous processes (SP’s)
- Limit flexion by restricting separation of the SP’s
Ligamentum Nuchae
- Originates at the external occipital protuberance and extends to C7 SP
- Helps sustain the weight of the head
Intertransverse ligament
In the Cx spine these types of fibres can be sparse and intertwined with the posterior intertransversariicolli muscles (providing stability in Cx lateral flexion)
Cervical Spine ROM
- C0/C1 = Upper cervical flexion/extension
- C1/C2 = Rotation
- C3/C7 = Lateral Flexion
Thoracic Spine
- 12 vertebrae
- T1, T9 & T10-12 atypical
- Fibrocartilaginous discs
- Coupled & double-jointed movements
- Heart shaped body
- Smaller vertebral foramen than Cx
- Elongated spinous processes
- Transvers costal facets
Atypical Thoracic Vertebra
T1:
- Superior costal facets are ‘whole’ as C7 does not have an inferior costal demifacet
T9:
- Has no inferior demifacet so does not connect to the 10th rib
T11 & 12:
- Single costal facets (T11=11th rib, T12=12th rib)
:
T10
- Sometimes has the same feature as T11 &12
- Important to appreciate anatomical variances
Thoracic Cage
- 12 ribs
- 1-7 true ribs
*Direct articulation with sternum - 8-10 false ribs
*Costal cartilage attaches indirectly to the
sternum (via the 7th rib costal cartilage) - 11 & 12 floating ribs
*No costal cartilage
Typical Rib Features
Head:
- Where articular facets are located
Neck:
- Extends from the rib head to the tubercle
Tubercle:
- Articulates with transverse process to create
the costotransverse joint
Body:
- Containing costal groove that houses intercostal vein/artery/nerve
Lumbar Spine
- 5 vertebrae
- Typical L1-4
- Atypical vertebra L5
- Short spinous process
- Large/thick/stout/kidney bean shaped
- Weight bearing
- Spinous Process
- blunt, quadrilateral (paddle shaped)
- Triangular-shaped vertebral foramen
- Smaller than Cx, larger than thx
Facet Joint Orientation **NEED TO FILL
Cervical:
- Coronal
Lumbar:
- Saggital
Flexors of the Trunk
- Rectus abdominis
- Psoas major and minor
- Iliacus
Extensors of the Trunk
- Erector Spinae
- Spinalis
- Longissimus
- Iliocastalis
- Quadratus Lumborum
Rotators of the Trunk
- External Oblique
- Internal Oblique
- Transversus Abdominis
- Erector Spinae (ILS)
Lateral Flexors of the Trunk
- Erector Spinae
- Quadratus Lumborum
Pelvis
- Ilium (innominate)
- Ischium
- Pubis
- Sacrum
- Coccyx
Gender Dimorphism in the Pelvis
Female differences:
- Wider and broader yet lighter
- Oval-shaped inlet versus heart shaped
- Less prominent ischial spines = greater
bispinous diameter
- Greater sub-pubic arch angle
- Shorter, more curved sacrum
Glenohumeral Joint
- Synovial, ball and socket joint
- Due to the loose joint capsule, and the relative size of the humeral head compared to the shallow glenoid fossa (4:1 ratio in surface area), it is one of the most mobile joints in the human body.
- Most commonly dislocated joint
Scapulothoracic Articulation & Scapulo-humeral rhythm
2:1 ratio Glenohumeral Joint (GHJ) :Scapulothoracic Joint (ST)
- ST contributes 60° rotation
- GHJ contributes 120° abduction
- Combines for a total of abduction 180°
- First 30 degrees of abduction largely occurs at GHJ.
- 30° on, GHJ & ST joint move simultaneously
Muscle Contributing to Flexion of Glenohumeral Joint
- Pectoralis Major
- Coracobrachialis
- Deltoid
- Long head of biceps brachii
Muscle Contributing to Extension of Glenohumeral Joint
- Latissimus Dorsi
- Long head of Triceps brachii
- Deltoid
- Teres Major
Muscle Contributing to Abduction of Glenohumeral Joint
- Supraspinatus (initiates first 15*)
- Deltoid (up to 90*)
Muscle Contributing to Adduction of Glenohumeral Joint
- Pectoralis Major
- Latissimus Dorsi
- Coracobrachialis
- Teres Major
Muscle Contributing to Internal Rotation of Glenohumeral Joint
- Subscapularis
- Teres Major
- Latissimus Dorsi
- Pectoralis Major
- Deltoid
Muscle Contributing to External Rotation of Glenohumeral Joint
- Infraspinatus
- Teres Minor
- Deltoid
Sternoclavicular Joint
- Only true joint connecting upper limb to trunk
- Clavicle, manubrium, 1st costal cartilage
- Joint incongruence
- Structure = saddle
- Function = ball and socket
Movements:
- Elevation/Depression (40°)
- Protraction/Retraction (34°)
- Axial rotation (20-40°)
Humeroulnar joint
- Articulation between humerus and ulnar
- Synovial hinge joint
- Uniaxial
- Flexion/extension
Muscles Contributing to Flexion of Humeroulnar Joint
- Biceps Brachii
- Brachialis
- Brachioradialis
Muscles Contributing to Extension of Humeroulnar Joint
- Triceps Brachii
Proximal Radioulnar joint
- Synovial pivot joint = Uniaxial
- Head of radius and radial notch of ulnar
- Annular ligament = “collar” around head of radius
Movements:
- Pronation/supination
Muscles Contributing to Pronation of Proximal Radioulnar Joint
- Pronator Teres
- Pronator Quadratus
Muscles Contributing to Supination of Proximal Radioulnar Joint
- Supinator
- Biceps Brachii
Distal Radioulnar Joint
- Distal radius and ulna
- A synovial pivot joint
- Uniaxial joint
- Pronation/supination
Muscles Contributing to Pronation of Distal Radioulnar Joint
- Pronator Teres
- Pronator Quadratus
Muscles Contributing to Supination of Distal Radioulnar Joint
- Supinator
- Biceps Brachii
Wrist Complex
Consists of:
- Radioulnar Joint
- Midcarpal Joint
Radiocarpal Joint
Distal radius articulates with:
- Scaphoid
- Lunate
- Triquetrum
Muscles Contributing to Flexion of Radiocarpal Joint
Flexion = 65-90°
- Flexor carpi ulnaris
- Flexor carpi radialis
- Palmaris longus
- Flexor digitorum superficialis
- Flexor digitorum profundus
Muscles Contributing to Extension of Radiocarpal Joint
Extension = 60-85°
- Extensor Carpi Radialis Longus & Brevis
- Extensor Carpi Ulnaris
- Extensor Digitorum
Muscles Contributing to Radial Deviation of Radiocarpal Joint
Radial Deviation = 15-20°
- Extensor carpi radialis longus & brevis
- Flexor carpi radialis
- Abductor pollicis longus
Muscles Contributing to Ulnar Deviation of Radiocarpal Joint
Ulnar Deviation = 20-45°
- Extensor carpi ulnaris
- Flexor carpi ulnaris
Hip – Iliofemoral Joint
Head of femur – acetabulum of ilium
- Synovial ball and socket; multiaxial
- Connects pelvic girdle to lower limb
- Designed for weight bearing
- Sacrifices mobility for stability
- Entire body weight transmitted through joint
when standing
- Most stable joint in the body
How is stability achieved for Iliofemoral Joint
- Depth of acetabulum
- Femoral head coverage
- Strong ligamentous structure/joint capsule
(iliofemoral, pubofemoral, ischiofemoral
ligaments)