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Jan 17, 2022 · English: The thenar eminence is present in the right hand, and absent in the left hand. Posterior view.
Jan 17, 2022 · English: The thenar eminence is present in the right hand, and absent in the left hand. View facing the thumbs.
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The thenar eminence is the mound formed at the base of the thumb on the palm of the hand by the intrinsic group of muscles of the thumb. The skin overlying this region is the area stimulated when trying to elicit a palmomental reflex .
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Blood supply. Action. Pathology. Additional images. References. Flexor pollicis brevis muscle. The flexor pollicis brevis is a muscle in the hand that flexes the thumb. It is one of three thenar muscles. [1] [2] It has both a superficial part and a deep part. Origin and insertion.
The abductor pollicis brevis is a flat, thin muscle located just under the skin. It is a thenar muscle, and therefore contributes to the bulk of the palm's thenar eminence . It originates from the flexor retinaculum of the hand, the tubercle of the scaphoid bone, and additionally sometimes from the tubercle of the trapezium .
May 1, 2023 · The thenar eminence is composed of three muscles that control the movements of the thumb: abductor pollicis brevis (APB), flexor pollicis brevis (FPB), and the opponens pollicis. Medical conditions that can affect the thenar eminence include carpal tunnel syndrome, arthritis, and amyotrophic lateral sclerosis (ALS), among others.
