Which of the following would be a likely result of severing the tibial and common fibular nerves?Multiple ChoiceDifficulty with dorsiflexion and plantar flexionDifficulty with hip flexionLoss of sensation from the thumb, index finger, and middle finger on each handLoss of sensation from the posterior arm
Question
Which of the following would be a likely result of severing the tibial and common fibular nerves?Multiple ChoiceDifficulty with dorsiflexion and plantar flexionDifficulty with hip flexionLoss of sensation from the thumb, index finger, and middle finger on each handLoss of sensation from the posterior arm
Solution
The tibial and common fibular nerves are both branches of the sciatic nerve, which is the major nerve to the lower limb. The tibial nerve primarily innervates the muscles of the posterior compartment of the leg and sole of the foot, which are responsible for plantar flexion and inversion of the foot. The common fibular nerve innervates the muscles of the anterior and lateral compartments of the leg, which are responsible for dorsiflexion and eversion of the foot.
Therefore, severing the tibial and common fibular nerves would likely result in difficulty with dorsiflexion and plantar flexion. The other options are not likely because they involve different nerves and areas of the body. For example, hip flexion is primarily controlled by the femoral nerve, and sensation from the thumb, index finger, and middle finger on each hand is provided by the median nerve. Sensation from the posterior arm is provided by the radial nerve.
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