5 Questions
Which muscle is the only upper limb muscle that is supplied by a cranial nerve?
Trapezius
Which muscle is involved in the 'shrugging the shoulder' test?
Trapezius
Which muscle is responsible for the abduction of the arm above 90 degrees?
Serratus anterior
Which group of muscles passes from the scapula to the humerus?
Rotator cuff muscles
Which region of the body has cutaneous innervation from C1 to C8?
Scalp region
Study Notes
Muscle Innervation and Function
- The only upper limb muscle supplied by a cranial nerve is the trapezius muscle, which is innervated by the spinal accessory nerve (CN XI).
- The trapezius muscle is involved in the 'shrugging the shoulder' test, indicating its role in scapular elevation.
- The supraspinatus muscle is responsible for the abduction of the arm above 90 degrees.
- The rotator cuff muscles, which include the supraspinatus, infraspinatus, teres minor, and subscapularis, pass from the scapula to the humerus.
Cutaneous Innervation
- The region of the body with cutaneous innervation from C1 to C8 is the upper limb, specifically the arm and hand.
Test your knowledge of the surface anatomy, cutaneous innervation, and muscles connecting the upper limb with the vertebral column in the scapular region. This quiz is designed for medical students at the University of Baghdad College of Medicine.
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