Applied Anatomy Of Muscles Of Upper Limb

APPLIED ANATOMY OF MUSCLES OF UPPER LIMB

Q. 1

A male patient presented with winging of scapula following a trauma. Nerve involved in this lesion is?

 A

Nerve supplying serratus anterior

 B

Pectoral nerve

 C

Subscapular nerve

 D

Ulnar nerve

Q. 1

A male patient presented with winging of scapula following a trauma. Nerve involved in this lesion is?

 A

Nerve supplying serratus anterior

 B

Pectoral nerve

 C

Subscapular nerve

 D

Ulnar nerve

Ans. A

Explanation:

Long thoracic nerve (C5–C7) descends posteriorly to the roots of the plexus and the axillary artery and along the lateral surface of the serratus anterior muscle, with the lateral thoracic artery, while supplying the muscle. Injury to the long thoracic nerve results in paralysis of the serratus anterior muscle. This presents with the medial border of the scapula sticking straight out of the back (winged scapula).

Q. 2

A young adult presents with proximal weakness of upper limbs, features of facial palsy and winging of scapula. The most likely diagnosis is:

 A

Facio-Scapulo-Humeral Dystrophy

 B

Limb-Girdle Dystrophy

 C

Scapuloperoneal Dystrophy

 D

Duchene Muscular Dystrophy

Q. 2

A young adult presents with proximal weakness of upper limbs, features of facial palsy and winging of scapula. The most likely diagnosis is:

 A

Facio-Scapulo-Humeral Dystrophy

 B

Limb-Girdle Dystrophy

 C

Scapuloperoneal Dystrophy

 D

Duchene Muscular Dystrophy

Ans. A

Explanation:

Answer is A (Facio-Scapulo-Humeral Dystrophy):

Weakness preferentially affecting the facial and shoulder girdle (proximal weakness of upper limb) together with winging of scapula in a young adult suggests a diagnosis of facio-scapulo-humeral dystrophy.

  • Autosomal Dominant (Positive Family History(2)
  • Abnormal gene 4q (4q35 deletion)
  • Childhood to young adulthood (may be delayed to 5th decade)
  • Mild 1st CPK (Normal Dystrophy)

Q. 3

Winging of scapula which muscle is affected

 A

Teres minor

 B

Latissimus dorsi

 C

Subscapularis

 D

Serratus anterior

Q. 3

Winging of scapula which muscle is affected

 A

Teres minor

 B

Latissimus dorsi

 C

Subscapularis

 D

Serratus anterior

Ans. D

Explanation:

Ans. is ‘d’ i.e., Serratus anterior

Winging of scapula

  • In this condition the vertebral border of scapula becomes more prominent when patient tries to push against wall.
  • It occurs in paralysis of the serratus anterior muscle in long thoracic nerve palsy.

Q. 4

Winging of scapula is due to which of these conditions?

 A

Long thoracic nerve palsy

 B

Thoraco-dorsal nerve palsy

 C

Erb’s palsy

 D

Klumpke’s palsy

Q. 4

Winging of scapula is due to which of these conditions?

 A

Long thoracic nerve palsy

 B

Thoraco-dorsal nerve palsy

 C

Erb’s palsy

 D

Klumpke’s palsy

Ans. A

Explanation:

Ans. is ‘a’ i.e., Long thoracic nerve palsy 



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