QuestionSBA
QuestionChoice
This is involved in adduction and internal rotation of the arm at the shoulder joint.
10005659
d
Pectoralis major
QuestionChoice
This muscle is responsible for internal rotation, adduction and extension of the arm.
10005657
b
Latissimus dorsi
QuestionChoice
This is responsible for the abduction of the arm after the first 15 degrees.
10005658
c
Deltoid
QuestionChoice
This muscle is responsible for protraction of the scapula. Therefore, winging of the scapula is caused by damage to the long thoracic nerve which innervates the serratus anterior.
10005656
a
Left serratus anterior
QuestionChoice
This muscle is responsible for arm flexion, not protraction of the scapula.
10005660
e
Biceps brachii
Concept
Chapter
2693
4433
Long thoracic nerve damage
Topic
145
Orthopaedics
13678
You are performing a shoulder examination on a patient who reports weakness and pain when moving the left shoulder. Examination reveals a left winged scapula.

Which of the following muscles is most likely to be affected to cause this presentation?
a