Gross Anatomical Observations of Abductor Pollicis Longus Muscle—A Cadaveric Study

Abductor pollicis longus (APL) muscle is known to exhibit different variations with respect to its attachments. Various studies have reported the splitting of the APL muscle. Comparative anatomical findings of split insertion of APL is commonly found in chimpanzees, gorillas and gibbons. In the present study, we describe an anomalous APL muscle, which originated from the posterior surface of the shaft of the radius and ulna and traversed a course deep to the extensor retinaculum. Interestingly, immediately after emerging form the deeper aspect of extensor retinaculum, the thin tendon of the APL muscle continued again as a muscular belly in relation to the dorsolateral part of the 1st metacarpal bone, to end as a tendon with its attachment to the base of the proximal phalanx. Such an unusual variation of APL with its attachment into proximal phalanx is a rare finding and may be of importance in altering the mechanics of the thumb during abduction. The clinical significance of such an anatomical variation of APL may be important during reconstructive surgeries involving thumb and also of academic interest.

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Abductor pollicis longus muscle — is it a new variant of the extensor forearm and thenar eminence or a well-known variation?

Folia Morphologica ◽

10.5603/fm.a2020.0047 ◽

2020 ◽

Vol 79 (2) ◽

pp. 417-417

Author(s):

G. P. Georgiev

Keyword(s):

Thenar Eminence ◽

Abductor Pollicis Longus ◽

Longus Muscle ◽

New Variant

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A Cadaveric Study of Palmaris Longus Muscle

Annals of International medical and Dental Research ◽

10.53339/aimdr.2022.8.1.23 ◽

2022 ◽

Vol 8 (1) ◽

pp. 175-179

Author(s):

SadiqaliAbbasali Syed

Keyword(s):

Upper Limb ◽

Cadaveric Study ◽

Muscle Morphology ◽

Anterior Compartment ◽

Palmaris Longus ◽

Longus Muscle ◽

Palmaris Longus Muscle ◽

Significant Difference ◽

Formalin Fixed

Background: Aim: To assess the palmaris longus muscle.Methods:40 formalin fixed cadavers of both genders were included. Routine dissection of the upper limb was carried following the Cunnigham’s Manual of Practical Anatomy. During the dissection of the anterior compartment of forearm, the Palmaris longus muscle was identified & carefully dissected.Results:Out of 40 cadavers, 22 were of males and 18 were of females. Morphology of Palmaris longus found to be normal in 18, agenesis in 6, fusiform in 4, hybrid in 6, bifurcated tendon in 5 and fleshy in 1 case. A significant difference was observed (P< 0.05).Conclusions:Surgeon must be aware of the variations of palmaris longus muscle. Morphology of Palmaris longus found to be normal, agenesis, fusiform, hybrid, bifurcated tendon and fleshy.

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Incidence of palamris longus muscle and tendon variations: a cadaveric study

Indian Journal of Clinical Anatomy and Physiology ◽

10.5958/2394-2126.2016.00125.0 ◽

2016 ◽

Vol 3 (4) ◽

pp. 547

Author(s):

Pabbati Raji Reddy

Keyword(s):

Cadaveric Study ◽

Longus Muscle

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MULTIPLE TENDONS OF THE ABDUCTOR POLLICIS LONGUS MUSCLE: A CASE REPORT

Hand Surgery ◽

10.1142/s0218810402001023 ◽

2002 ◽

Vol 07 (02) ◽

pp. 289-291 ◽

Cited By ~ 5

Author(s):

Mithat Akan ◽

Kaan Gideroğlu ◽

Baris Çakir

Keyword(s):

Case Report ◽

Hand Surgery ◽

Abductor Pollicis Longus ◽

Longus Muscle

In the case presented below, we observed abductor pollicis longus (APL) dividing into five sections shortly after exiting the first compartment. Many variations of APL may be seen and it is essential to know these variations in the practice of hand surgery.

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