MSK Extra Flashcards
Transverse Fractures happen why
Direct Blow/Trauma
Oblique Fractures happen why
Bending movement with slight rotation
A comminution fracture looks like a
butterfly
A spiral fracture happens why
Rotational force
The ventral aspect of foot becomes which aspect of foot in embryology
Plantar aspect
The medial nerve enters palm of hand via
Carpal tunnel
Radial nerve enters through
first web space
Posterior tibial artery and nerve enter side of foot…
posterior to medial malleolus
The posterior tibial artery gives rise to
Plantar arch
Ankle Joint type
Hinge Synovial
Which joint is described as Uniaxial
Ankle
Malleolar grip is strongest during
Dorsiflexion
Ankle Is unstable during
plantar flexion
What stabilises the ankle during eversion
Medial or Deltoid Ligament
Which ligament is commonly involved in Ankle Injuries
Lateral Ligament
A pott fracture is a dislocation of
Ankle
An ankle sprain is what type of movement injury
inversion
A footballer’s ankle is a
repeated strain on anterior capsule
Tarsal Tunnel Syndrome compresses
Tibial Nerve
Which muscles invert foot
TIbialis Ant and Pos
which muscles evert foot
Fibularis longus and braves
Which arch of foot is higher and more important
Medial
Which ligament maintains integrity of arches
Spring/Calcaeneolvaciular
Which muscles of foot maintain integrity of arch
Intrinsic
Why do flat feet happen in children
Subcut Fat
Acquired flatfeet happens due to
dysfunction of tibias posterior
Hip Joint ball is
Femoral Head
Hip Joint Socketi s
Acetabulum
Head of Femur articulates with
Acetabulum
Depth of acetabulum increased by
Fibrocartilage Acetabular Labrum and Transverse Acetabular Labrum
Ileofemoral ligament prevents
Hyperextension of Hip
Pubofemoral Ligament prevents
Overabductor of Hip
Which muscle is chief flexor of hip
Iliopsoas
The medial and lateral circumflex arteries are branches of
Profunda Femoris Artery
The artery to head of femur is branch of
Obturator Artery
Knee Joint type
Hinge Synovial
Articular surfaces of knee
Femora-Tibial and Femoro-Patella
How Many bursae around knee
12
how many bursae communicate with joint cavity
4
Tibial Collateral Ligament in knee extends from
Medial Epicondyle of Femur to Medial Condyle and Medial Tibia
Deep Fibres of Tibial Collateral Ligament are firmly attached to
Medial Meniscus
Fibular Collateral Ligament extends from
Lateral epicondyle of femur to head of fibula
Tendon of Popliteus passes deep to which ligament
Fibular Collateral Ligament
The intra-articular surfaces within knee consists of
Cruciate Ligaments and Menisci
Which knee ligament is weaker
Anterior Cruciate Ligament
What does the anterior cruciate ligament do
Prevents hyperextension of knee
and posterior displacement of femur on tibia
What does posterior cruciate ligament do
prevents hyeprflexion of knee
Menisci of knee made up of what type of cartilage
Fibrocartilage
Tendon of what separates Lateral meniscus from PCL
Popliteus
When the knee locks what is happening
medial rotation of femur on tibia
When the knee unlocks what is happening
lateral rotation of tibia on knee
which muscle unlocks knee
popliteus
Name three fibrous joints
Periodontal Ligament
Cranial Sutures
Interosseous Membranes
Primary cartilage joints are made up of what type of cartilage only
Hyaline
Secondary cartilage joints are made up of what type of cartilage
Hyaline and Fibrocartilage
Synchondrosis is primary or secondary cartilage
Primary
Symphysis is primary or secondary cartilage
Secondary
Articular cartilage is also known as
Hyaline Cartilage
What produces collagen and glycoproteins
flat chondrocytes
what produces proteoglycans such as aggrecan
round chondrocytes
What do Type A Synoviocytes do
Remove Debris and contribute to synovial fluid production
What do Type B Synoviocytes do
main producer of synovial fluid
Synovial fluid is made up of
Hyaluronic Acid and Lubrican
Turnover of Synovial Fluid
2 Hours
What happens to viscosity of synovial fluid with age
Increases so reduced lubrication and slower joint movements
Where does Serratus Anterior attach
Medial Scapula and Protracts/Stablises Pectoral Girdle
Which movement is deltoid primarily involved in
Abduction
what movement does subscapularis do
medial rotation internal
Where does biceps attach
Scapula to Radius
Brachialis movement
Flexor of elbow
brachioradialis movement
flexor in mid position
biceps brachii movements
supinator
biceps brachii antagonists
pronator teres
pronator quadratura
When does development of limbs begin
4th Week with somatic lateral mesoderm
When do upper limb buds appear
24 days then 1-2 days later lower limb bud
Which gene causes proximo-distal patterning
Hox genes
What happens if you remove Hoxa-11 and Hoxd-11
Radius and ulna do not form
limb buds elongate by proliferation of
mesenchyme
At the apex of each limb bud what thickens to form Apical Ectodermal ridge
Ectoderm
Upper limbs rotate by how many degrees
90 laterally
lower limb buds rotate by how many degrees
90 medially
during which week do peripheral nerves grow from limb plexuses
5th week
when is critical period of limb development
24-36 days after fertilisation
Weakness of which muscle can cause winging of scapula
Serratus Anterior
Which muscles involved in hand supination
Biceps brachii and supinator
which muscles involved in hand pronation
Radius rotates
Pronator Quadratus
pronator Teres
Radioulnar joints contribute to
Pronation and Supinator
Which muscles flex elbow
Biceps Brachi
Brachioradialis
Brachialis
which muscles extend elbow
Triceps
Anconeus
Which muscles abduct shoulder
Mid Deltoid and Supraspinatus
which muscles adduct shoulder
Pec major and Lat dorsi
which muscles medial rotate shoulder
Teres Major and Subscapularis
which muscles lateral rotate shoulder
Teres minor and infraspinatus
Ulnar Collateral Ligaments extends from
Medial epicondyle to coronoid process and olecranon
Radial collateral ligament extends from
lateral epicondyle of humerus
Axillary Nerve at risk when
Shoulder DIslocation
Fracture neck of humerus
which muscle becomes weak when axillary nerve damaged
deltoid
which rotator cuff muscle is not a rotator of shoulder joint
supraspinatus
The palmar interossei do what movement
Aductor
The Dorsal Interossi do what movement
Abduct
Which joint is known as diarthrodial joint
Hip
Normal angle of neck shaft hip
130
Normal angle of fem ante version hip
15
Normal angle of acet ante version hip
20
Intraccapsular Hip injury will likely need
Surgery
Which menisci is firmly attached to tibia
medial
Proximal and Distal Interphalngeal joints are only in
Fingers
The more what a fracture in the hand the more likely to develop AVN
Proximal
What can be palpated in anatomical snuffbox
Radial artery
Scaphoid
Trapezium
Which artery in hand is superficial arch
Ulnar
Which artery in hand is deep arch
Radial
How to do Allens Test
Occlude both wrist arteries
Release ulcer: should reperfuse in 15 seconds