Anatomy Upper Limb

Question 1

1. ) The superior angle and inferior angle is connected by the which border ?
2. ) Superior to Lateral ?
3. ) Lateral to inferior ?

Answer 1

1. Medial border
2. Superior border
3. Lateral Border

Question 2

Which border is thick and thin?

Answer 2

Thin - Medial ( vertebral) Border
Thick- Lateral (Axillary) border
Ref- Tortora

Question 3

Recall the origin, insertion, action, and nerve for biceps brachii

Answer 3

origin- Long head= supraglenoid tubercle
Short head = coracoid process of scapula
insertion = radial tuberosity
Action = flexion of forearm & shoulder, supination at radioulnar joint,
Nerve = Musculocutaneous

Question 4

Supination and Pronation ?

Answer 4

Supination = Palms facing upwards
Pronation = opposite

Question 5

Recall for Coracobrachialis

Answer 5

Origin- Coracoid process of scapula
Insertion- medial humerus
Action- adducts humerus, flexes at glenohumeral joint
Nerve- Musculocutaneous

Question 6

Recall for Brachialis

Answer 6

Origin- Humerus where coracobrachialis ends
Insertion- ulna tuberosity
Action- flexion at elbow joint
Nerve- Musculocutaneous & radial

NB: biceps brachii attaches to radial tuberosity, Brachialis at ulnar tuberosity hence both is flextion

Question 7

Reacll of triceps brachii

Answer 7

Origin- Long heed = infraglenoid tubercle
Lateral head = posterior of humerus superior to radial groove

Insertion- Olecranon of Ulna
Action- Extention of elbow & shoulder
Nerve- Radial Nerve

Question 8

Rotator Cuff Muscles (SITS) - shoulder muscles that stabilize the shoulder

Answer 8

Supraspinatus - supraspinus fossa(abduct)
Infraspinatus - Infraspinus fossa (laterally rotates)
Teres Minor - lateral border of scapula (laterally rotates)

ORIGIN ABOVE = Greater tuberosity of humerus

Subscapularis - subscapular fossa

                         - lesser tuberosity of humerus
                         - medially rotates

Question 9

Recall Innervation of rotator cuff

Answer 9

Supra & Infraspinatus = subscapular nerve
Subscapularis = lower and upper subscapular n

Teres minor = axillary nerves

Question 10

Recall for teres major

Answer 10

Origin = inferior border of scapula
Insertion = intertubecular sulcus of hunerus
Action = medially rotates
Lower subscapular nerve

Question 11

Name the back muscle from superficial to deep

Answer 11

Trapezius –) Romboid major, minor & levator scapulae –) seratus anteroir
Lower back Latismus dorsi

Question 12

Recall for muscles under trapezius i.e levator scapulae, rhomboid major, minor

Answer 12

Levator scapula = C1 to C4 - dorsalscapular n
Rhomboid minor = C7 to T1- dorsal scapular n
Rhomboid major = T2 to T5 - dorsal scapular n

• -) All insert to Medial border of scapula
• -) All raises the medial border of scapula

Question 13

Recall for Trapezius muscle

Answer 13

Origin - occiputal bone from C7 till T17

Insertion - upper fibres - lateral 1/3 of clavicle
Middle & lower - acromion & spine

Nerve = spinal part of accesory nerve

Upper - elevate scapula
Middle - medially rotate scapula
Lower - pull the medial border of scapula down

Question 14

Recall for Latissmus Dorsi

Answer 14

Origin - lower thoracic spine, lumbar fascia,illiac crest , inferior angle of scapula

Insertion = floor of intertubucular sulcus

• Thoracordorsal nerve

Extention, adduction, medially rotates arm

Question 15

Differentiate between Muscle Power & Strength

Answer 15

Muscle Power = ability to exert maximum force in a short time as possible for acceleration, jumping, throwing, etc

Muscle Strength - maximum force one can apply against a load

Question 16

What is Muscle Tone

Answer 16

slight contractions in muscle contractions that contribute to posture and to resist force for a period of time

Question 17

Recall for pectoralis major

Answer 17

origin = clavicle, sternum and coastal cartilage
Insertion = intertubercular sulcus
nerve = medial and lateral pectoral nerve
ACTION = adduction of arm, medial rotation of arm
clavicular fibres also flexes the arm

Question 18

What do u think about Scapulothoracic Jonit

Answer 18

• not a true synovial joint
• articulation is formed by the convex surface of the posterior thoracic cage and the concave surface of the anterior scapula

Question 19

Info about pec minor

Answer 19

O = 3rd, 4th, 5th ribs 
I = coracoid process
N = medial pectoral nerve
Action = depresses the shoulder, if scapula fixed then elevates point of origin at ribs

Question 20

Recall subclavius muscle

Answer 20

O = first costal cartilage
I = clavicle 
N = nerve to the subclavius from upper trunk
A = depresses clavicle & stedies dduring movement