Foot muscles Flashcards
Intrinsic Muscles of the Foot in the dorsal aspect
Extensor Digitorum Brevis
Extensor Hallucis Brevis
is a thin muscle found on the dorsum of
the foot these muscles work in unison to extend the corresponding digits of the foot
extensor digitorum brevis
a short muscle located in the dorsum of
the foot, attaching between the calcaneus and proximal phalanx of the big to (hallux). main function of this muscle is to assist in the extension of the big toe at
the metatarsophalangeal joint.
extensor hallucis brevis
First Layer of the foot in the plantar aspect
Abductor Hallucis
Flexor Digitorum Brevis
Abductor Digiti Minimi
is a fusiform muscle located superficially
and medially in the foot. function of this muscle is to abduct and
flex the great toe.
abductor hallucis
is a broad muscle found deep in the sole
of the foot in charge of the toe flexion at
the metatarsophalangeal joints of the lateral four digits. also supports the longitudinal arch of foot while propelling the body forward during gait.
Flexor digitorum brevis
lying along the lateral border of the
foot, it is the most lateral muscle of the first layer. main function involves abduction of the 5th finger, as well as flexion of its proximal
phalanx.
Abductor digiti minimi
Second Layer of the foot in the plantar aspect
Quadratus Plantae
`Lumbricals
also called the flexor accessories, is one of
the central plantar muscles of the foot. function of this muscle is to
facilitate walking.
Quadratus plantae
are the four small muscles found in the sole of
the foot.
- flex and adduct the lateral four toes at
the metatarsophalangeal joints and extend them
at the interphalangeal joints. - these actions contribute to the biomechanical
balance of the foot during walking.
Lumbricals of the foot
Third Layer of the foot in the plantar aspect
Flexor Hallucis Brevis
Adductor Hallucis
Flexor Digiti Minimi Brevis
is a small intrinsic muscle of the foot. It is
located deep within the sole, on the medial aspect. main function is to flex the great toe at the metatarsophalangeal joint.
Flexor Hallucis brevis
is a two-headed, intrinsic muscle of the
sole of the foot. facilitate walking by adducting and flexing
the great toe (hallux).
Adductor Hallucis
is a small muscle found in the sole of
the foot.
- is one of the muscles responsible
for flexing the toes
Flexor digiti minimi brevis
Fourth Layer of the foot in the plantar aspect
Plantar Interossei
Dorsal Interossei
are a group of three small muscles
found in the central compartment of the
sole of the foot. They maintain the position of 3rd to 5th toes and prevent them from thrusting apart once the body weight is applied to the forefoot
Plantar Interossei
are the four feather-like muscles found in the central compartment of the sole of the foot. Helps flex the lateral three toes at the metatarsophalangeal joints
Dorsal interossei
Types of Body Movements
- Flexion.
- Extension.
- Rotation.
- Abduction
- Adduction.
- Circumduction
- Opposition
is a fusiform muscle located in the
anterior forearm
- it helps in the flexing the hand on the wrist
Flexor Carpi Radialis Muscle
is a long muscle of the anterior forearm.
- helps in wrist flexion and tensioning the
palmar aponeurosis. - This muscle plays an important function
in the anatomy of the grip.
Palmaris Longus
- is a fusiform muscle located in the
anterior compartment of the forearm
Together with other muscles of the anterior
forearm, flexor carpiulnaris, flexes the hand
at the wrist.
Flexor Carpi Ulnaris Muscle
- is the largest muscle of the anterior
compartment of the forearm. - the main action of this muscle is flexion of
the digits 2-5 at both the metacarpopharyngeal
and proximal interphalangeal joints.
Flexor Digitorum Superficialis
- is a fusiform muscle located deep within
the anterior (flexor) compartment of
the forearm. - it also assists in flexion of the hand on
the wrist.
Flexor Digitorum Profundus
- the most lateral and the most superficial
thenar muscles, located underneath the skin - its function is abduction of the thumb at
the carpometa-carpal joint.
Abductor Policis Brevis
- short intrinsic muscle of the hand.
- acts on the thumb and flexes it at
the metacarpophalangeal joint.
Opponens Policis
- short, broad intrinsic muscle of the hand
- acts on the thumb
and flexes it at the metacarpophalangeal
joint.
Flexor policis brevis
- is a triangular intrinsic muscle of
the hand. - main action of this muscle is adduction of
the thumb in the carpometacarpal joint.
adductor policis
- a small quadrangular muscle found in the
hypothenar region of the hand. - this muscle aids in producing and
maintaining an effective and strong grip by
tightening the palmar aponeurosis.
palmaris brevis
- located on the ulnar side of the palm,
between the wrist - is responsible for flexion, lateral rotation
and opposition of the little finger
opponens digiti minimi
- are located on the ulnar (medial) aspect of the hand
- main function of this muscle is the flexion of the little finger
Flexor Digiti Mini
- short intrinsic muscle of the hand.
- main function involves abduction of the 5th finger, as well
as flexion of its proximal phalanx.
abductor digital minimi
- are four muscles in the back of the hand
- acts to abduct (spread) the index, middle,
and ring fingers away from hand’s midline
(ray of middle finger)
dorsal interosseous
- are short unipennate intrinsic muscles of
the hand. - helps in the movement of the fingers
towards the middle finger.
palmar interosseus
