Region: Lower Limb

Fibularis Brevis

Fibularis Brevis The structure indicated is the fibularis (peroneus) brevis muscle. The fibularis brevis muscle is one of the muscles of the lateral compartment of the leg. The leg consists of three muscular compartments: anterior, posterior and lateral. The lateral compartment consists of two muscles: Fibularis (peroneus) longus Fibularis (peroneus) brevis The lateral muscles are responsible for eversion of the foot and are innervated by the superficial fibular (peroneal) nerve, which is a branch of the common fibular nerve. The common fibular nerve is a branch of the sciatic nerve and divides into the superficial fibular nerve and the deep …

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fibularis brevis

Extensor Hallucis Longus

Extensor Hallucis Longus The structure indicated is the extensor hallucis longus muscle. The extensor hallucis longus is one of the four muscles of the anterior compartment of the leg. The muscles of the leg consist of three compartments: Anterior Posterior Lateral In the anterior compartment are the four following muscles: Tibialis anterior Extensor hallucis longus Extensor digitorum longus Fibularis tertius The muscles of the anterior compartment of the leg serve to dorsiflex the ankle joint, extend the toes and invert the foot, and they are supplied by the deep fibular (peroneal) nerve. Origin: Middle half of medial fibula and interosseous …

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extensor hallucis longus

Extensor Digitorum Brevis

 Extensor Digitorum Brevis The structure indicated is the extensor digitorum brevis muscle. This muscle is the only intrinsic muscle of the foot located on the dorsal aspect, and serves to extend digits 2 to 4. Origin: Superolateral calcaneus Insertion: Base of proximal phalanx of great toe, lateral portion of tendons of extensor digitorum longus of toes 2 – 4. Action: Extension of great toe at MTP joint. Flexion of toes 2 – 4. Innervation: Deep fibular nerve. Learn more about the anatomy of the foot muscles in this tutorial.
extensor digitorum brevis

Gluteus Maximus

Gluteus Maximus The structure indicated is the gluteus maximus. The gluteus maximus muscle is one of the muscles of the gluteal region. The muscles in the gluteal region are divided into a superficial and deep group. There are four muscles of the superficial group: Gluteus maximus Gluteus medius Gluteus minimus Tensor fasciae latae There are 5 muscles in the deep group: Gemellus superior Gemellus inferior Quadratus femoris Piriformis Obturator internus The gluteus maximus muscle is the largest of the gluteal muscles, and is also the largest muscle in the human body. Origin: Posterior surface of ilium, posterior superior iliac crest, …

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gluteus maximus

Gluteus Minimus

Gluteus Minimus The structure indicated is the gluteus minimus. The gluteus minimus muscle is one of the muscles of the gluteal region. The muscles in the gluteal region are divided into a superficial and deep group. There are four muscles of the superficial group: Gluteus maximus Gluteus medius Gluteus minimus Tensor fasciae latae There are 5 muscles in the deep group: Gemellus superior Gemellus inferior Quadratus femoris Piriformis Obturator internus Origin: Dorsal ilium between inferior and anterior gluteal lines and edge of greater sciatic notch. Insertion: lateral and superior surfaces of greater trochanter Action: Hip abduction, hip medial rotation (anterior …

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gluteus minimus

Posterior Inferior Tibiofibular Ligament

Posterior Inferior Tibiofibular Ligament The structure indicated is the posterior inferior tibiofibular ligament. The distal ends of the tibia and the fibula are held together by the inferior portion of the interosseous membrane. The interosseous membrane is the membrane which joins the tibia to the fibula along its entire length, separating the leg into anterior and posterior compartments. There are two apertures within the interosseous membrane proximally and distally which allow vessels to pass from one compartment to the other. In addition to the attachment of the interosseous membrane inferiorly between the distal tibia and fibula, this inferior articulation is …

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posterior inferior tibiofibular ligament

Piriformis

Piriformis The structure indicated is the piriformis muscle. The piriformis muscle is one of the muscles of the gluteal region. The muscles in the gluteal region are divided into a superficial and deep group. There are four muscles of the superficial group: Gluteus maximus Gluteus medius Gluteus minimus Tensor fasciae latae There are 5 muscles in the deep group: Gemellus superior Gemellus inferior Quadratus femoris Piriformis Obturator internus The deep muscles of the gluteal region generally serve to laterally rotate the femur. The piriformis muscle passes through the greater sciatic foramen and divides it into two spaces: Greater sciatic foramen …

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Piriformis

Vastus Lateralis

Vastus Lateralis The structure indicated is the vastus lateralis The vastus lateralis is one of the muscles that makes up the quadriceps femoris, and is contained in the anterior compartment of the thigh. The muscles of the anterior compartment are all innervated by the femoral nerve and serve generally to extend the leg at the knee joint. The four muscles that make up the quadriceps femoris are the: Rectus femoris Vastus lateralis Vastus medialis Vastus intermedius In addition to the quadriceps muscles, the Sartorius muscle is also located in the anterior compartment together with the distal ends of the iliopsoas …

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Vastus Lateralis

Pectineus

Pectineus The structure indicated is the pectineus muscle. The pectineus muscle is one of six muscles in the medial compartment of the thigh. The thigh consists of three muscular compartments: Anterior Medial Posterior The medial compartments consists of the following muscles: Gracilis Pectineus Adductor longus Adductor brevis Adductor magnus Obturator externus All the muscles of the medial compartment are innervated by the obturator nerve except for the pectineus (femoral nerve) and the hamstring part of the adductor magnus (tibial division of sciatic). The muscles of the medial compartment generally serve to adduct the thigh at the hip joint. Due to …

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Pectineus

Extensor Digitorum Longus

Extensor Digitorum Longus The structure indicated is the extensor digitorum longus muscle. The extensor digitorum longus is one of the four muscles of the anterior compartment of the leg. The muscles of the leg consist of three compartments: Anterior Posterior Lateral In the anterior compartment are the four following muscles: Tibialis anterior Extensor hallucis longus Extensor digitorum longus Fibularis tertius The muscles of the anterior compartment of the leg serve to dorsiflex the ankle joint, extend the toes and invert the foot, and they are supplied by the deep fibular (peroneal) nerve. Origin: Proximal ½ of medial surface of fibula. …

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extensor digitorum longus