Question1.33 Which muscle is being targeted in the exercise shown in the image? (IMAGE ATTACHED) dorsal interossei flexor digitorum brevis plantaris tibialis posterior flexor hallucis brevis ResetMaximum marks: 1 Flag question undefined单项选择题
A
dorsal interossei
B
flexor digitorum brevis
C
plantaris
D
tibialis posterior
E
flexor hallucis brevis

Question

Question1.33 Which muscle is being targeted in the exercise shown in the image? (IMAGE ATTACHED) dorsal interossei flexor digitorum brevis plantaris tibialis posterior flexor hallucis brevis ResetMaximum marks: 1 Flag question undefined单项选择题

A

dorsal interossei

B

flexor digitorum brevis

C

plantaris

D

tibialis posterior

E

flexor hallucis brevis

BlackTom AI · Accepted Answer

The question asks which muscle is being targeted in the exercise shown in the image. I will evaluate each option in turn to understand which muscle is most likely involved based on anatomical function and the position of the foot illustrated.

Option 1: dorsal interossei. These muscles are located between the metatarsal bones and primarily function to abduct the toes away from the second toe. They are intrinsic foot muscles involved in toe spreading rather than flexion at the big toe. Since the image seems to emphasize the movement of the big toe or the medial side of the foot rather than toe abduction, this option is unlikely to be the targeted muscle.

Option 2: flexor digitorum brevis. This muscle lies in the plantar (sole) aspect of the foot and flexes the proximal interphalangeal joints of toes 2–5. It does not directly affect the big toe (hallux) and the exercise in the image appears to focus on medial toe movement rather than bending multiple lesser toes. Therefore, this is probably not the muscle being targeted.

Option 3: plantaris. The plantaris is a vestigial-like muscle with a long tendon that crosses the ankle and assists in knee flexion and plantar flexion of the foot. It is not typically targeted in exercises focusing on toe movements or intrinsic foot actions. Given the image context, this is unlikely to be the primary muscle involved.

Option 4: tibialis posterior. This muscle inverts the foot and supports the arch, with actions primarily at the ankle, not a prime mover of toe flexion. The depicted task seems centered around the toes rather than the sole-inversion mechanics, so this option is less plausible as the primary targeted muscle.

Option 5: flexor hallucis brevis. This muscle is one of the intrinsic muscles of the plantar foot and flexes the proximal phalanx of the big toe at the metatarsophalangeal joint. Given the image’s emphasis on movement of the big toe or medial foot region, and the common instructional focus on flexion of the hallux, this option aligns best with the depicted action. It directly explains a flexion action of the big toe, which often appears prominent in such visual cues.

In summary, the incorrect options generally describe muscles with actions either unrelated to big-toe flexion or more about other parts of the foot (toe spreading, ankle movements, or arch support). The correct option corresponds to a muscle whose primary role is flexing the big toe at the metatarsophalangeal joint, which matches the visual cue of toe movement toward the sole.