Extensor Hallicus Longus

Information about Extensor Hallicus Longus



The mucous sheaths of the tendons around the ankle. Lateral aspect. (Ext. hall. long. labeled at upper left.)

Cross-section through middle of leg. (Extensores longi digitorum et hallucis labeled at upper left.)
Latin	musculus extensor hallucis longus
	subject #129 481
Origin:	Arises from the middle portion of the fibula on the anterior surface and the interosseous membrane
Insertion:	Inserts on the dorsal side of the base of the distal phalanx of the big toe
Artery:	anterior tibial artery
Nerve:	peroneal nerve
Action:	Extends the big toe and assists in dorsiflexion of the foot at the ankle. Also is a weak invertor
Antagonist:	Flexor hallucis longus, Flexor hallucis brevis
Dorlands/Elsevier	m_22/12548925

The Extensor hallucis longus is a thin muscle, situated between the Tibialis anterior and the Extensor digitorum longus.

It arises from the anterior surface of the fibula for about the middle two-fourths of its extent, medial to the origin of the Extensor digitorum longus; it also arises from the interosseous membrane to a similar extent.

The anterior tibial vessels and deep peroneal nerve lie between it and the Tibialis anterior.

The fibers pass downward, and end in a tendon, which occupies the anterior border of the muscle, passes through a distinct compartment in the cruciate crural ligament, crosses from the lateral to the medial side of the anterior tibial vessels near the bend of the ankle, and is inserted into the base of the distal phalanx of the great toe.

Opposite the metatarsophalangeal articulation, the tendon gives off a thin prolongation on either side, to cover the surface of the joint.

An expansion from the medial side of the tendon is usually inserted into the base of the proximal phalanx.

Variations

Occasionally united at its origin with the Extensor digitorum longus.

Extensor ossis metatarsi hallucis, a small muscle, sometimes found as a slip from the Extensor hallucis longus, or from the Tibialis anterior, or from the Extensor digitorum longus, or as a distinct muscle; it traverses the same compartment of the transverse ligament with the Extensor hallucis longus.

Additional images

The mucous sheaths of the tendons around the ankle. Medial aspect.

Deep nerves of the front of the leg.

Nerves of the dorsum of the foot.

External links

-1657470947 at GPnotebook
SUNY Labs 15:st-0402 - "The Leg: Muscles"
LUC exhl
Extensor+hallucis+longus at eMedicine Dictionary
University of Washington

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

• • [ e] Muscles of lower limbs
ILIAC REGION/ILIOPSOAS	psoas major - psoas minor - iliacus
BUTTOCKS	gluteals: (maximus, medius, minimus) - tensor fasciae latae lateral rotator group: piriformis - obturator externus - obturator internus - inferior gemellus - superior gemellus - quadratus femoris
THIGH	anterior compartment: sartorius - quadriceps (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis) - articularis genu medial compartment/adductor: gracilis - pectineus - adductor brevis - adductor longus - adductor magnus posterior compartment/hamstring: biceps femoris - semitendinosus, semimembranosus
LEG	anterior compartment: tibialis anterior - extensor hallucis longus - extensor digitorum longus - fibularis tertius posterior compartment: superficial - calf/triceps surae (gastrocnemius, soleus) - plantaris deep - popliteus - tarsal tunnel (flexor hallucis longus - flexor digitorum longus - tibialis posterior) lateral compartment: fibularis muscles (longus - brevis)
FOOT	dorsal - extensor digitorum brevis - extensor hallucis brevis plantar first layer - abductor hallucis - flexor digitorum brevis - abductor digiti minimi plantar second layer - quadratus plantae - lumbrical muscle plantar third layer - flexor hallucis brevis - adductor hallucis - flexor digiti minimi brevis plantar fourth layer - dorsal interossei - plantar interossei

Latin}}}
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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bold refer to the diagram at right.)

In the skull (8):

1-9. cranium
7. mandible

''In the middle ears (6):

malleus
incus
stapes

In the throat (1):

hyoid

In the shoulder girdle (4):
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For other uses see fibula (disambiguation)

The fibula or calf bone is a bone located on the lateral side of the tibia, with which it is connected above and below.
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An interosseous membrane is a broad and thin plane of fibrous tissue that separates many of the bones of the body. It is an important component of many joints.

Interosseous membranes in the human body:

Interosseous membrane of the forearm

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bold refer to the diagram at right.)

In the skull (8):

1-9. cranium
7. mandible

''In the middle ears (6):

malleus
incus
stapes

In the throat (1):

hyoid

In the shoulder girdle (4):
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Distal phalanges (single distal phalanx) are bones found in the limbs of most vertebrate skeletons. In humans, they are the finger bones located furthest from the shoulder joint, and the toe bones located furthest from the hip.
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hallux pl. halluces or big toe is the innermost toe of the foot, counted as digit I.

In humans, the hallux is longer than the second or pointer toe for a majority of people.
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Arteries are muscular blood vessels that carry blood away from the heart.^[1] All arteries, with the exception of the pulmonary and umbilical arteries, carry oxygenated blood.

The circulatory system is extremely important for sustaining life.
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The anterior tibial artery of the lower limb carries blood to the anterior compartment of the leg and dorsal surface of the foot, from the popliteal artery.

It is accompanied by a deep vein, the anterior tibial vein, along its course.
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Accessory nerve
Accessory obturator nerve
Alderman's nerve
Anococcygeal nerve
Ansa cervicalis
Anterior interosseous nerve
Anterior superior alveolar nerve
Aortic plexus
Auerbach's plexus
Auriculotemporal nerve
Axillary nerve

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The common peroneal nerve (common fibular nerve; external popliteal nerve; peroneal nerve), about one-half the size of the tibial nerve, is derived from the dorsal branches of the fourth and fifth lumbar and the first and second sacral nerves.
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Kinesiology is the scientific study of the anatomy, physiology, and mechanics of body movement, especially in humans. ^[1] The word kinesiology is derived the Greek "kinesis" (motion) + the suffix -ology or -logy from the greek "logos" or "logia"(meaning a field of study).
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Dorsiflexion is the movement which decreases the angle between the foot and the leg. The movement moving in opposite directions is called Plantarflexion.

The range of motion for dorsiflexion is indicated in the literature as 20Â° to 30Â°.
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ankle joint is formed where the foot and the leg meet. The ankle, or talocrural joint, is a synovial hinge joint that connects the distal ends of the tibia and fibula in the lower limb with the proximal end of the talus bone in the foot.
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An antagonist is a kind of muscle that acts in opposition to the movement generated by the agonist and is responsible for returning a limb to its initial position.

Antagonistic pairs in houses

These antagonistic muscles are found in pairs called antagonistic pairs.
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The Flexor hallucis longus muscle (FHL) is a muscle of the leg. It is one of the deep muscles of the posterior compartment of the leg. the other deep muscles of the leg are flexor digitorum longus and tibialis posterior. FHL is the largest and most powerful of these deep muscles.
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The Flexor hallucis brevis arises, by a pointed tendinous process, from the medial part of the under surface of the cuboid bone, from the contiguous portion of the third cuneiform, and from the prolongation of the tendon of the Tibialis posterior which is attached to that bone.
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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In human anatomy, the tibialis anterior is a muscle in the shin that spans the length of the tibia. It originates in the upper two-thirds of the lateral surface of the tibia and inserts into the medial cuneiform and first metatarsal bones of the foot.
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The Extensor digitorum longus is a pennate muscle, situated at the lateral part of the front of the leg.

Origin and insertion

It arises from the lateral condyle of the tibia; from the upper three-fourths of the anterior surface of the body of the fibula; from the upper
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For other uses see fibula (disambiguation)

The fibula or calf bone is a bone located on the lateral side of the tibia, with which it is connected above and below.
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A tendon (or sinew) is a tough band of fibrous connective tissue that connects muscle to bone and is built to withstand tension. Tendons are similar to ligaments except that ligaments join one bone to another.
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The inferior extensor retinaculum of the foot (cruciate crural ligament, lower part of anterior annular ligament) is a Y-shaped band placed in front of the ankle-joint, the stem of the Y being attached laterally to the upper surface of the calcaneus, in front of the
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Phalanges is commonly given to the bones that form fingers and toes. In primates such as humans and monkeys, the thumb and big toe have two phalanges, while the other fingers and toes consist of three. Phalanges are classified as long bones.
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The metatarsophalangeal articulations are of the condyloid kind, formed by the reception of the rounded heads of the metatarsal bones in shallow cavities on the ends of the first phalanges.

The ligaments are the plantar and two collateral.
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GPnotebook is a British medical database for general practitioners (GPs).^[1] It is an online encyclopaedia of medicine that provides an immediate reference resource for clinicians worldwide. The database consists of over 30,000 pages of information.
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The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind in the Borough of Brooklyn in New York City.
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Loyola University Chicago is a private co-educational religious-affiliated university established in Chicago in 1870 as Saint Ignatius College. It was founded by the Roman Catholic religious order of the Society of Jesus and bears the name of the Jesuit patron, Saint Ignatius of
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