Upper Limb Anatomy(EMRCS+Almatary+other Sources) Flashcards
What is the shape of the clavicle?
S-shaped
Write short notes on the parts of the clavicle
Write short notes on the ends of the clavicle
Compare the sternal(medial) and acromial(lateral) ends of the clavicle
What is the other name for the sternal clavicular end?
Medial clavicular end
What is the shape of the sternal(medial)clavicular end?
(1) Quadrangular shape
(2) More robust(bulky)
Write short notes on the facet of the sternal(medial)clavicular end
What is the shape of the facet of the sternal(medial)clavicular end?
Forward facing convex
What is the size of the facet of the sternal(medial)clavicular end?
Much larger
What is the function of the facet of the sternal(medial)clavicular end?
For articulation
(1) mainly with-manubrium sterni
(2) to a lesser extent with the-1st costal
Write short notes on the acromial(lateral) clavicular end?
What is the shape of the acromial(lateral) clavicular end?
Flat
Write short notes on the facet of the acromial(lateral) clavicular end?
What is the shape of the facet of the acromial(lateral) clavicular end?
(1) Forward facing concave
(2) oval
What is the size of the facet of the acromial(lateral) clavicular end?
Small
What is the function of the facet of the acromial(lateral) clavicular end?
For articulation with a similar facet on the medial surface of the acromion of the scapula
Write short notes on the surfaces of the clavicle
What is the other name for the superior clavicular surface
Upper clavicular surface
What is the characteristic of the superior(upper) clavicular end?
Smooth
What is the other name for the inferior clavicular surface?
lower clavicular surface
Write short notes on inferior(lower) clavicular surface
What is the characteristic of the lateral 1/3rd of the clavicle?
Lateral 1/3rd of the clavicle possesses a distinct tuberosity consisting of:
(1) conoid tubercle
(2) trapezoid line
-Definition- lateral roughening
- Function- attachment of the coracoclavicular
ligament :-
a)trapezoid ligament (lateral)
b)conoid ligament (medial)
Define trapezoid line
lateral roughening
What is the function of the trapezoid line?
attachment of the coracoclavicular ligament :-
a)trapezoid ligament (lateral)
b)conoid ligament (medial)
What are the ligaments that are attached to the trapezoid line?
coracoclavicular ligament :-
a)trapezoid ligament (lateral)
b)conoid ligament (medial)
Write short notes on the surgical importance of the clavicle?
1st/Sternoclavicular joint
The clavicle carries the weight of the upper limb and transmits to the trunk through its articulation with the sternum (Sternoclavicular joint).
2nd/Fracture clavicle
+Incidence:It is one of the most fractured bones in the body
+Aetiology:Direct violence as falling on an outstretched hands(FOOSH)
+Site:The junction between the two curvatures
+Effect:SHOULDER DROP-the lateral fragment is displaced downwards by the weight of the limb.
What is the incidence of the clavicle fracture?
It is one of the most fractured bones in the body
What is the aetiology of the clavicle fracture?
Direct violence as falling on outstretched hand(FOOSH)
What is the effect of the clavicle fracture?
Shoulder drop- the lateral fragment is displaced downward by
the weight of the limb
What is the most common site of the clavicle fracture?
The junction between the two curvatures
What is the size of the scapula?
Large
What is the shape of the scapula?
Flat and triangular
What are the parts of the scapula?
Rule of 3 :-
(1) 3 angles
(2) 3 borders
(3) 2 surfaces
(4) 3 processes
(5) 3 fossae
Write short notes on the scapular angles
1st/superior(upper)angles
At the level of the 2nd rib
2nd/inferior(lower)angles
At the level of the 7th rib
3rd/lateral angles(glenoid cavity)
*shape-shallow
*function-for articulation of the head of the humerus to form
shoulder
*landmarks- MNEMONIC; ITS B or BITS
1)supraglenoid tubercle:for attachment of biceps
brachii muscle
2)infraglenoid tubercle:for attachment of triceps
brachii muscle
What is costal level of the superior(upper) scapular angle?
At the level of the 2nd rib
What is the costal level of the inferior(lower) scapular angle?
At the level of the 7th rib
Write short notes on the lateral angle(glenoid cavity)
*shape-shallow
*function-for articulation of the head of the humerus to form
shoulder
*landmarks- MNEMONIC; ITS B or BITS
1)supraglenoid tubercle:for attachment of biceps
brachii muscle
2)infraglenoid tubercle:for attachment of triceps
brachii muscle
What is the shape of the lateral scapular angle(glenoid cavity)?
shallow
what is the function of the lateral scapular angle(glenoid cavity)?
for articulation of the head of the humerus to form shoulder
Define the brachial plexus
A network of nerve fibres that supplies the skin and musculature of the upper limbs
What is the location of brachial plexus?
What is the origin of the brachial plexus?
What are the components of the brachial plexus?
Draw a schematic presentation of the brachial plexus
Discuss formation of the brachial plexus
What is the location of the roots,trunks and division of the brachial plexus?
Lie in the posterior triangle of the neck
What is the location of the cords of the brachial plexus?
(1)Lie in the axilla
(2)Related to the axillary artery,being medial,lateral and posterior as per their name respectively.
Discuss formation of the roots of the brachial plexus
Discuss formation of the trunks of the brachial plexus
Discuss formation of the upper trunk of the brachial plexus
Formed by union of the upper two (C5-C6) roots
Discuss formation of the middle trunk of the brachial plexus
C7 continues as the middle trunk
Discuss formation of the lower trunk of the brachial plexus
Formed by union of the lower two (C8-T1) roots
Discuss formation of the divisions of the brachial plexus
What is the location of formation of divisions of brachial plexus?
Behind middle 1/3rd of the clavicle
What is the role of the anterior(ventral) cord in the formation of the divisions of brachial plexus?
It innervates the entire flexor compartment of U/L
Discuss formation of the cords of brachial plexus
Discuss formation of the lateral cord of the brachial
Formed by the union of the anterior (ventral) divisions of the upper and middle trunks
Discuss formation of the middle cord of the brachial
plexus
Continuation of the anterior (ventral) division of the lower trunk (C8-T1)
Discuss formation of the posterior cord of the brachial
Formed by the union of the posterior(dorsal)divisions of all 3 trunks (upper,middle and lower trunks)
What is the feature of the posterior cord of the brachial plexus?
Has no contribution from anterior(ventral)division
Discuss formation of branches of brachial plexus
The cord give rise to major branches of the brachial plexus
Discuss formation of the prefixed plexus of the brachial plexus
Define prefixed plexus of brachial plexus
When a branch from C4-C5 contributes to the innervation of the glenohumeral and elbow flexor muscles
What is the feature of prefixed plexus of the brachial plexus?
Has no significant contribution from T1