Muscles of the thumb - Wikipedia
The muscles of the thumb are nine skeletal muscles located in the hand and forearm. The muscles allow for flexion, extension, adduction, abduction and opposition of the thumb.
The Muscles of the Hand - Thenar - Hypothenar
2024年9月27日 · The thenar muscles are three short muscles located at the base of the thumb. The muscle bellies produce a bulge, known as the thenar eminence . They are responsible for the fine movements of the thumb.
Thenar muscles: Anatomy, innervation and function | Kenhub
2023年11月13日 · The main function of the thenar muscles is to produce the movements of the thumb. More specifically, these muscles are responsible for the abduction and flexion of the thumb at the metacarpophalangeal (MCP) and carpometacarpal (CMC) joints.
Body Anatomy: Upper Extremity Muscles | The Hand Society
The thenar muscle group is found at the base of the thumb, forming the muscle bulk on the thumb side of the hand. It is comprised of three muscles: the abductor pollicis brevis, the flexor pollicis brevis, and the opponens pollicis.
Thumb - Structure, Function, Anatomy, Diagram, Significance
2024年12月31日 · The thumb is the first and most versatile digit of the human hand, distinguished by its opposability, which allows it to perform complex and precise movements. It is composed of two phalanges (proximal and distal) and articulates with the trapezium bone of the wrist via the carpometacarpal (CMC) joint. ... Muscles of the Thumb. The thumb’s ...
Hand Anatomy: Bones & Muscles Full Review | OrthoFixar 2025
2024年7月12日 · The hand muscles are those that originate and insert within the hand and are responsible for fine finger movements. Short Muscles of the Thumb Abductor Pollicis Brevis: The APB arises from the flexor retinaculum and the trapezium bone and inserts on the radial aspect of the proximal phalanx of the thumb. It is innervated by the median nerve and ...
Anatomy, Shoulder and Upper Limb, Hand Intrinsic Muscles
2023年7月17日 · The thenar muscle, or thenar eminence, is a collection of three muscles at the fleshy base of the thumb (first digit) on the palmar aspect that acts to exert movement about the thumb. The thenar muscles include abductor pollicis brevis (APB), flexor pollicis brevis (FBB) and opponens pollicis (OPP). [10]
Anatomy and Function of the Thenar Muscles - Hand Clinics
It is in the motion and function of the thumb that the thenar muscles play their anatomic role. There are four intrinsic muscles of the thumb: abductor pollicis brevis (APB), opponens pollicis (OPP), flexor pollicis brevis (FPB), and adductor pollicis (ADD).
Biomechanics of the thumb - University of Oklahoma Health …
2001年3月12日 · Rapid extension of the thumb's IP joint involves the extensor pollicis longus (EPL), and is often accompanied by palpable activity in the thenar muscles. The first CMC joint may even flex in the plane of the palm.
Thenar Eminence: Muscles, Anatomy, Definition, and Function - Healthline
2019年5月28日 · The thenar eminence is a group of three small muscles at the base of the thumb. Despite their small size, they’re very important for controlling fine thumb movements such as grabbing and...