Anatomy Quiz Lower Leg Muscles And Groups

The correct answer is the plantar surface of the distal phalanx of the great toe. This is because the flexor hallucis longus muscle is responsible for flexing the great toe. It originates from the posterior surface of the fibula and inserts onto the plantar surface of the distal phalanx of the great toe. This allows for the movement of flexion in the great toe.

The soleus muscle originates from the posterior surface of the upper fibula and tibia. This means that it is attached to the back part of the upper bones of the leg.

The flexor digitorum longus is a muscle located in the lower leg. Its main function is to flex the second to fifth toes and to invert the foot. In other words, it helps to curl the toes downwards and turn the foot inward. This muscle is important for controlling movements of the toes and maintaining stability and balance while walking or running.

The correct answer is the insertion of the tibialis posterior muscle. The tibialis posterior muscle originates from the posterior tibia, interosseous membrane, and fibula. It inserts onto the navicular tuberosity.

The actions of the flexor hallucis longus include flexing the big toe (hallux), plantarflexion of the foot, and inverting the foot. However, dorsiflexion is not one of the actions of the flexor hallucis longus. Dorsiflexion refers to the movement of lifting the foot upwards towards the shin, and this is not a function of the flexor hallucis longus.

The flexor digitorum longus is located on the posterior surface of the tibia and it inserts onto the plantar surface of the bases of the 2nd to 5th distal phalanges. This means that the muscle starts on the back of the shin bone (tibia) and its tendon extends to the bottom surface of the toes (phalanges) in the middle and ring fingers.

The insertion of the Gastrocnemius and soleus muscles is through the calcaneal tendon to the calcaneus. The calcaneal tendon, also known as the Achilles tendon, is a strong fibrous band that connects the calf muscles to the heel bone (calcaneus). This insertion allows the muscles to exert force on the calcaneus, enabling movements such as plantar flexion of the foot.

The gastrocnemius muscle is responsible for plantarflexing the foot, which means it helps to point the foot downward. Additionally, it also assists in plantarflexing the ankle and flexing the knee when the leg is not bearing weight. It does not have any role in dorsiflexing the foot or flexing the big toe.

The correct answer is "above medial & lateral condyle of femur." The medial head and lateral head of the Gastrocnemius muscle originate from the area above the medial and lateral condyles of the femur bone. This means that the muscle attaches to the femur bone at this specific location.

The origin of the popliteus muscle is the lateral femoral condyle. This means that the muscle originates from the outer part of the rounded end of the femur bone. It does not originate from the supracondylar ridge, calcaneal, or interosseous membrane.

The actions of tibialis posterior include inversion and plantarflexion of the ankle. Inversion refers to the movement of the foot towards the midline of the body, while plantarflexion refers to pointing the foot downward. Therefore, the correct answer is inversion plantarflexion of the ankle.

The popliteus muscle is responsible for medially rotating the tibia on the femur and unlocking the knee, assisting in knee flexion, and helping to unlock the knee. It does not extend the knee.

The insertion of the popliteus muscle is on the posterior and medial tibial surface. This means that the muscle attaches to the back and inner side of the tibia bone. The popliteus muscle plays an important role in unlocking the knee joint by internally rotating the tibia. By inserting on the posterior and medial tibial surface, the popliteus muscle is able to effectively perform this function and aid in knee movement and stability.

The flexor hallucis longus originates from the fibula.

The plantaris muscle is compared to a weak gastrocnemius because both muscles are located in the calf and play a role in plantar flexion of the foot. However, the gastrocnemius is a larger and stronger muscle compared to the plantaris.

The action of the soleus muscle is to plantarflex the foot. Plantarflexion refers to the movement of pointing the toes downward, as if pressing the gas pedal in a car. The soleus, along with the gastrocnemius muscle, is responsible for this action. When the soleus contracts, it helps to push the foot downward, allowing for movements such as walking, running, and jumping.

The plantaris muscle originates from the lateral supracondylar ridge of the femur. This means that it starts from a bony ridge on the outer side of the lower end of the femur bone. This origin point is important for understanding the muscle's function and its role in movements of the leg and foot.

The insertion of plantaris is through the calcaneal tendon to the calcaneus. This means that the plantaris muscle attaches to the heel bone (calcaneus) by inserting into the calcaneal tendon.