Question

Which of the following are skeletal muscles named on the basis of their location?
A. Quadriceps
B. Subscapularis
C. Adductor
D. Supraspinatus
E. Rectus abdominis
Choose the correct answer from the options given below

• A. A and B only
• B. A, B and C only
• C. A, B and D only
• D. A, B, D and E only

Hint:

Muscle Naming Rules:
Location = Subscapularis, Supraspinatus, Infraspinatus, Intercostals.
Action = Adductor, Abductor, Flexor, Extensor.
Fiber Direction = Rectus, Transverse, Oblique.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Anatomical nomenclature of skeletal muscles based on anatomical location, number of origins/heads, fiber orientation, and action.

Step 2: Detailed Explanation:
Criteria for anatomical naming of skeletal muscles:
1. Named on Basis of Location Bone Association:
- B. Subscapularis: Located on the subscapular fossa (under the scapula).
- D. Supraspinatus: Located in the supraspinous fossa above the spine of the scapula.
- A. Quadriceps femoris: Located on the anterior femur (quadriceps refers to four heads on the femoral location).
2. Named on Basis of Action: C. Adductor (causes adduction of limb toward midline).
3. Named on Basis of Fiber Direction: E. Rectus abdominis (rectus = straight parallel fibers).
Thus, muscles named primarily with anatomical regional reference include A, B, and D.

Step 3: Final Answer:
Hence, the muscles named on the basis of location are A, B and D only, corresponding to option (C).