Abductor Hallucis Muscle on:
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The abductor hallucis muscle is an intrinsic muscle of the
The abductor hallucis muscle is located in the medial border of the foot and contributes to form the prominence that is observed on the region. It is inserted behind on the tuberosity of the
Image:Sobo 1909 309.png, Superficial dissection of the sole of the foot, showing the medial eminence formed by abductor hallucis
Image: Muscles in the human foot (seen from below).jpg, Abductor hallucis muscle
Image:Gray357.png, Coronal section through right talocrural and talocalcaneal joints
PTCentral
{{Authority control Foot muscles Muscles of the lower limb Lower limb anatomy
foot
The foot ( : feet) is an anatomical structure found in many vertebrates. It is the terminal portion of a limb which bears weight and allows locomotion. In many animals with feet, the foot is a separate organ at the terminal part of the leg made ...
. It participates in the abduction and flexion
Motion, the process of movement, is described using specific anatomical terms. Motion includes movement of organs, joints, limbs, and specific sections of the body. The terminology used describes this motion according to its direction relativ ...
of the great toe
Toes are the digits (fingers) of the foot of a tetrapod. Animal species such as cats that walk on their toes are described as being '' digitigrade''. Humans, and other animals that walk on the soles of their feet, are described as being '' pl ...
.
Structure
The abductor hallucis muscle is located in the medial border of the foot and contributes to form the prominence that is observed on the region. It is inserted behind on the tuberosity of the calcaneus
In humans and many other primates, the calcaneus (; from the Latin ''calcaneus'' or ''calcaneum'', meaning heel) or heel bone is a bone of the tarsus of the foot which constitutes the heel. In some other animals, it is the point of the hock.
S ...
, the flexor retinaculum, and the plantar aponeurosis. Its muscle body, relatively thick behind, flattens as it goes forward. It ends in a common tendon with the medial head of the flexor hallucis brevis
A flexor is a muscle that flexes a joint. In anatomy, flexion (from the Latin verb ''flectere'', to bend) is a joint movement that decreases the angle between the bones that converge at the joint. For example, one’s elbow joint flexes when one ...
that inserts on the medial surface of the base of the first proximal phalanx
The phalanges (singular: ''phalanx'' ) are digital bones in the hands and feet of most vertebrates. In primates, the thumbs and big toes have two phalanges while the other digits have three phalanges. The phalanges are classed as long bones. ...
and its related sesamoid bone
In anatomy, a sesamoid bone () is a bone embedded within a tendon or a muscle. Its name is derived from the Arabic word for ' sesame seed', indicating the small size of most sesamoids. Often, these bones form in response to strain, or can be pres ...
. Its medial surface is superficial and covered with the muscle's fascia and the skin.
Nerve supply
Abductor hallucis is supplied by themedial plantar nerve
The medial plantar nerve (internal plantar nerve) is the larger of the two terminal divisions of the tibial nerve (medial and lateral plantar nerve), which accompanies the medial plantar artery.
From its origin under the laciniate ligament it p ...
. The nerves that supply it enter the muscle from its upper border.
Additional images
See also
* Intrinsic muscles of the foot *Sole of the foot
The sole is the bottom of the foot.
In humans the sole of the foot is anatomically referred to as the plantar aspect.
Structure
The glabrous skin on the sole of the foot lacks the hair and pigmentation found elsewhere on the body, and it has ...
References
External links
*PTCentral
{{Authority control Foot muscles Muscles of the lower limb Lower limb anatomy