40 Questions
Which spinal nerve root is responsible for innervating the deltoid muscle?
C5
What is the dermatome associated with the C6 nerve root?
Anterior skin of the thumb
Which muscle is innervated by the C7 nerve root?
Triceps
What is the myotome associated with the C8 nerve root?
Finger flexors
Which of the following is the correct dermatome for the T1 nerve root?
Antero/medial elbow
What is the muscle function of the C5 nerve root?
Arm abduction
Which nerve root is responsible for finger abduction?
T1
What is the dermatome associated with the C7 nerve root?
Anterior skin of digits 2 and 3
Which muscle is innervated by the C6 nerve root?
Biceps
What is the clinical test for the C8 dermatome?
Sensation of skin of digits 4 and 5
Which of the following is NOT a wall of the axillary space?
Lateral wall formed by the lower part of the humerus
Which of the following structures passes through the axillary space?
All of the above
What is the purpose of the axillary space?
To provide a transition region between the root of the neck and the upper limb
Which of the following veins are part of the venous system of the upper limb?
Both superficial and deep veins
What is the purpose of the venous system in the upper limb?
To drain deoxygenated blood from the hand, forearm, and arm
Which of the following is NOT a content of the axillary space?
Infraclavicular part of the brachial plexus
What is the shape of the axillary space?
Pyramidal
Which of the following is NOT a wall of the axillary space?
Medial wall formed by the lower 4 ribs and serratus anterior muscle
What is the primary function of the axillary space?
To serve as a transition region between the root of the neck and the upper limb
Which of the following is NOT a content of the axillary space?
Thoracic duct
What is the primary function of lateral rotation of the shoulder joint?
To allow the arm to extend behind the body
Which of the following muscles is not involved in horizontal adduction of the shoulder joint?
Infraspinatus
In what position should the elbow be placed to measure the range of rotation of the shoulder joint?
Bent at 90 degrees with forearm in the sagittal plane
What is the maximum range of lateral rotation of the shoulder joint?
80 degrees
Which of the following muscles is involved in horizontal abduction of the shoulder joint?
Teres major
What is the reference position for measuring horizontal movements of the shoulder joint?
90 degrees abduction of the shoulder joint in the frontal plane
Which of the following movements of the shoulder joint has the smallest range?
Horizontal abduction
Which muscle is involved in both horizontal adduction and abduction of the shoulder joint?
Deltoid
What is the total range of transverse movements of the shoulder joint?
Less than 180 degrees
Which of the following movements involves scapular rotation in addition to shoulder joint motion?
Horizontal movements
Which muscle is primarily responsible for flexion of the interphalangeal (IP) joint of the thumb?
Flexor pollicis brevis
Which of the following muscles is classified as an extrinsic extensor of the digits?
Extensor digitorum
What is the primary action of the palmar interossei muscles?
Adduction of the digits
Which of the following movements of the metacarpophalangeal (MCP) joint of the thumb has the smallest range of motion?
Abduction/Adduction
What is the maximum range of flexion at the distal interphalangeal (DIP) joint of the fingers?
90°
Which muscle is responsible for abduction of the little finger?
Abductor digiti minimi
Which of the following muscles is an extrinsic extensor of the thumb?
Extensor pollicis longus
What is the maximum range of hyperextension at the proximal interphalangeal (PIP) joint of the fingers?
5°-10°
Which of the following muscles is an intrinsic flexor of the digits?
Lumbricals
What is the primary action of the dorsal interossei muscles?
Abduction of the digits
Test your knowledge on Upper Limb Nerves, Dermatomes & Myotomes discussed in BMS Anatomy Lecture 9. This quiz is based on information presented in Moore's Clinically Oriented Anatomy, 9th edition, specifically focusing on the Upper Limb Chapter (Pages: 165 – 174). Check your understanding of topics like the Brachial Plexus Supraclavicular Branches and more.
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