12. List the muscle(s) that cross the ankle posteriorly and have their primary action at the: A. Ankle. B. Foot. C. Toes.
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Step 1: The muscles that cross the ankle posteriorly and have their primary action at the ankle are the **gastrocnemius** and **soleus**. Show more…
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Muscles that move the foot and toes attach the femur, tibia and fibula to bones in the ankle and toes. These muscles can produce dorsiflexion, plantar flexion, eversion and inversion. Describe each of these actions in your own words. plantar flexion: dorsiflexion: eversion: inversion: You will examine only a very few of these muscles. The muscles in this region are divided by fascia into compartments: anterior, lateral and posterior. A. Place ADAM in an anterior view Anterior compartment - muscles that dorsiflex the foot 1. Go to layer 178 - 183 and examine the lower leg. Locate the tibialis anterior. This muscle originates on the lateral tibia and inserts on the medial cuneiform (a tarsal) and the first metatarsal. When it contracts it produces dorsiflexion and inversion of the foot. 2. Another muscle in this compartment can be seen more clearly at layer 187 - 196. It originates on the proximal tibia and fibula and inserts on the surface of the four lateral toes through a series of tendons. This muscle is the . When it contracts, it produces dorsiflexion of the foot. This muscle also everts the foot and extends the toes (hence its name) B. Change ADAM to posterior view Posterior compartment - muscles that produce plantar flexion 1. Go to layer 132 - 135 to view one of the two muscles forming the posterior calf, the gastrocnemius. This muscle has two heads which originate on the medial and lateral condyles of the femur. This allows the gastrocnemius to flex the knee as well as plantar flex the foot. The muscle inserts through a large tendon called the calcaneal or Achilles tendon onto the (bone). 2. Slowly scroll down until the gastrocnemius muscle disappears. Locate the soleus which is deep to the gastrocnemius. This muscle originates on the tibia and fibula and inserts with the gastrocnemius onto the calcaneus. Together the soleus and gastrocnemius serve as prime movers of plantar flexion. 4. Label these diagrams with the names of the muscles you have learned.
Adi S.
Muscle analysis chart: Ankle Complete the chart by listing the tarsal and subtalar muscles/joints involved in each movement:
Suman K.
Drag each label to the box indicating the correct muscle compartment or bone. Muscle that inserts on the calcaneus that only plantar flexes. Gastrocnemius. Group that everts the foot. Group that inverts the foot. Soleus. Includes a muscle that inserts on the base of the fifth metatarsal. Includes the tibialis posterior. Anterior compartment. Also known as the peroneal group. Includes the extensor digitorum longus. Deep posterior compartment. Muscle that flexes the knee and plantar flexes the ankle.
Madhur L.
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