Osterology Of Upper Limb Flashcards
Why Clavicle is Modified Long Bone;
- Horizontally placed
- No Medullary Cavity
- Subcutaneous
- Intra-membranous development
MC site of for Clavicle Fracture is
Junction of Medial 2/3rd and Lateral 1/3rd
2 ends of Clavicle;
Sternal end and Acromial end
Weight from appendicular skeleton transmitted to axial skeleton via thsese joints;
• Sternoclavicular Joint
• Acromioclavicular joint
Sternoclavicular Joint is which type of Synovial Joint
Saddle type of Synovial Joint
How proximal and distal fragments of clavicle displaces after fracture
Fracture causes
The upward displacement of the proximal fragments (scm)
And, Downward displacement of the distal fragment (deltoid)
Ligaments attached to Coracoid process of Scapula
- Coracoacromial ligament
- Coracoclavicular ligament
- Coracohumeral ligament
Acromioclavicular Joint is ________ type of Synovial joint
Plane type of Synovial Joint
Ligaments involved in the weight transmission from the appendicular skeleton to axial skeleton
- Acromio-clavicular Ligament
- Coraco-clavicular Ligament (to clavicle)
- Sterno-clavicular Ligament
- Costo-clavicular Ligament (to axial skeleton via clavicle)
- Inter-clavicular Ligament
Coraco-acromial Ligament is not involved in the weight transmission from appendicular to axial skeleton.
True/False
True
SupraScapular Foramen transmits
SupraScapular Nerve
SupraScapular Artery passes above the foramen(above transverse scapular ligament)
Level of Superior Angle of Scspula
T2 Vertebra
Level of Inferior angle of Scapula
T7 Spine or T8 Body
Supra-Glenoid Tubercle giving origin to
Long Head Of Biceps
Infra-Glenoid Tubercle giving origin to
Long Head of Triceps
Which border of Scapula is only for Muscle Insertion
Medial Border
Muscle Inserted on Medial Border of Scapula
Posterior Surface;
Medial Border - Only insertion
On posterior side 3 Muscles;
Levator Scapulae
Rhomboid Major
Rhomboid Minor
On Anterior side;
Serratus anterior
Which border of Scapula is only for Origin of Muscle
Anterior Surface;
Posterior Surface;
Lateral Border - only origin
On Posterior Side;
Teres minor
Teres major
On Anterior Side;
Subscapularis
Coracoid process is which type of Epiphysis?
Atavastic type of Epiphysis - Phylogenetically independent but fuse with other bones mainly for nutrition
Muscles attached to Coracoid Process
P - Pectoralis minor
C - Coracobrachialis
B - short head of Biceps
Insertion of Trapezius Muscle
Upper Border of Spine + Medial Border of Acromion Process + Posterior Border of Clavicle
Muscle inserted to Lesser Tubercle of Humerus
Subscapularis Muscle
Muscles inserted to Greater Tubercle
S ~ Supraspinatus
I ~ Infraspinatus
T ~ Teres Minor
Inter-Tubercular Sulcus of Humerus is also known as
Bicipital Groove
Structure passing through Bicipital Groove/Intertubercular Groove
Long head of Biceps
Of Inter-Tubercular Sulcus of Humerus
Muscle attached to;
Medial Lip -
Floor -
Lateral Lip -
Medial Lip - Teres major
Floor - Lattismus dorsi
Lateral Lip - Pectosalis major
Laddy b/w Two Major
Neck of the Humerus is related to
Axillary Nerve
Content of Spiral/Radial Groove
Radial Nerve + Profunda brachii artery
Deltoid tuberosity receives Insertion of which muscle
Deltoid Muscle
Rotator Cuff Muscles are;
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
Boundaries of Quadrangular Space;
Superior -
Inferior -
Medial -
Lateral -
Superior - Teres minor and Capsule of Shoulder Joint
Inferior - Teres major
Medial - Long head of Triceps
Lateral - Neck of Humerus
Contents of Quadrangular Triangle;
Axillary Nerve
Posterior Circumflex Humeral Vessels
Boundaries of Triangular Interval / Lower Triangular Space;
Superior -
Medial -
Lateral -
Superior - Teres Major
Medial - Long head of Triceps
Lateral - Shaft of Humerus
Contents of Triangular Interval / Lower Triangular Space;
Radial Nerve
Profunda brachii vessels
Boundaries of Upper Triangular Space;
Base -
Superior -
Inferior -
Base - Long head of Triceps
Superior - Teres minor
Inferior - Teres Major
Contents of Upper Triangular Space;
Circumflex scapular vessels
Boundaries of Axilla;
Medial -
Lateral -
Medial - Rib,
Serratus anterior
Long Thoracic Nerve
Lateral - Inter-tubercular sulcus
Boundaries of Axilla;
Anterior -
Posterior -
Anterior - Pectoralis Major and Minor
Posterior - Subscapularis
Teres major
Lattisimus dorsi
Contents of Axilla
Axillary Artery
Axillary Vein
Cords of brachial plexus - medial, lateral, posterior
Axillary Nodes
5 Groups of Axillary Nodes
Five groups of Axillary Nodes
Anterior Lateral Posterior Central Apical
Other name for Anterior Axillary Nodes
Pectoral nodes
Other name for Posterior Axillary Nodes
Subscapular Nodes
Other Name for Lateral Axillary Nodes;
Humeral nodes
Vein accompanied by Anterior Axillary / Pectoral Nodes;
By Lateral Thoracic Vein
Vein accompanied by Posterior Axillary / Subscapular Nodes;
Subscapular Vein
Vein accompanied by Lateral Axillary / Humeral nodes;
Axillary Vein
Anterior, Posterior and Lateral Axillary Nodes Drain into
Central Nodes → Apical Nodes
Trochlea of the humerus bone articulates with ___________ and forms ___________ Joint.
Trochlear notch of Ulna → Humeroulnar Joint
Capitulum of the humerus bone articulates with →
→_____________ Joint
Head of the radius
→ Humeroradial Joint
Coronoid fossa of the humerus bone articulates with
Coronoid process of Ulna
Olecranon fossa of humerus bone (posteriorly) articulates with
Olecranon process of Ulna
Fossa above the Capitulum of humerus
Radial Fossa
Extracapsular Structures at the Lower end of Humerus
Medial Epicondyle and Lateral Epicondyle
Lateral Epicondyle gives origin to
Common Extensors of Forearm
Medial Epicondyle gives origin to
Common Flexors of Forearm
Epicondyle involved in the Tennis Elbow
Lateral Epicondyle
Epicondyle involved in the Golfer’s Elbow
Medial Epicondyle
Ulnar Tuberosity receives Insertion of _________ Muscle
Brachialis Muscle insertion → Ulnar Tuberosity
Radial Tuberosity receives Insertion of _________ Muscle
Biceps Muscle insertion → Radial Tuberosity
Number of RadioUlnar Joint;
Three RadioUlnar Joints;
Superior ~
Middle ~
Inferior ~
What is the type of each RadioUlnar Joint?
Superior ~
Middle ~
Inferior ~
Superior ~ Pivot Joint
Middle ~ Syndesmosis
Inferior ~ Pivot Joint
What is Pronation and Supination
Movement of radius over a stationary ulna
Joints involved in the Pronation and Supination Movement
Humeroradial Joint
Superior RadioUlnar Joint
Inferior RadioUlnar Joint
Supination and Pronation mainly occurs at these three joints
Degenerated part of Flexor pollicis longus is
Oblique cord
Structure piercing the Inter-Osseous membrane
Anterior Inter-Osseous Artery
Lister’s tubercle present in the
Lower end of Radius
Carpal bones - Proximal Raw;
From lateral to Medial;
Scaphoid
Lunate
Triquetrum
Pisiform
Carpal bones - Distal Raw;
From lateral to medial;
Trapezium
Trapezoid
Capitate
Hamate
RadioCarpal/Wrist joint is which type of joint
Synovial, Biaxial and Ellipsoid joint
Bones involved in the Wrist Joint Formation;
Articulation between Lower end of Radius and
Scaphoid, Lunate, Triquetrum
In the neutral position of wrist, Which bones are in contact with the radius and articular disc;
Only Scaphoid and Lunate
The triquetrum comes in contact into apposition with the disc only in full adduction of the wrist
Most commonly fractured bone from Carpals;
Scaphoid
Most commonly dislocated bone from Carpals;
Lunate
Largest Carpal Bone
Capitate
Smallest Carpal Bone
Pisiform - Sesamoid bone formed in Tendon of Flexor carpi ulnaris
From Carpals; 1st Bone to ossify
Capitate - by 2nd Month of Intrauterine life
From Carpals; Last bone to Ossify
Pisiform - by 12 years
1st Metacarpal Bone only articulates with
Trapezium → Saddle joint
1st metacarpal bone does not articulate with other metacarpals.
Base of the 1st Metacarpal is
It lies -
Convexo-Concave
→ Saddle Joint
It lies more Anterior and Medial
For the 1st Metacarpal bone, the Primary Ossification Centre appears at
At base
If Primary Ossification Centre of 1st Metacarpal is at the Head of Metacarpal
Then it is called as
Aberrant epiphysis
Aberrant means - not usually present
Primary ossification centre of 2nd, 3rd, 4th and 5th metacarpal appear at
Head of Metacarpal
When the elbow is extended and supinated, the carrying angle is approximately
17°
Carrying angle is used to identify Varus or Vagus in the elbow joint.
Rotator interval is an area between
Supraspinatus and Subscapularis
A normal scapulohumeral rhythm is in the ratio of
2:1
First bone to ossify in human body;
Clavicle - by 5th-6th weeks of intrauterine life
Stability of the Shoulder joint is provided by
- Rotator cuff - formed by blending of tendons of 4 muscles
- Tendon of long head of biceps
- Coracoacromial ligament