Ankle plantar flexion is mediated by which ligament root level via the Gastrocnemius and Soleus?

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Multiple Choice

Ankle plantar flexion is mediated by which ligament root level via the Gastrocnemius and Soleus?

Explanation:
Plantar flexion of the ankle is produced mainly by the calf muscles, gastrocnemius and soleus, which are innervated by the tibial nerve coming from the sacral plexus. The motor roots that primarily drive this action are S1 (and to a lesser extent S2). In clinical testing, weakness of plantar flexion or a diminished Achilles reflex points to S1–S2 function. Other root levels listed do not primarily govern these muscles—their main roles are different parts of the leg and lower limb innervation. Therefore, the root level most consistent with plantar flexion via these muscles is S1 (with contribution from S2).

Plantar flexion of the ankle is produced mainly by the calf muscles, gastrocnemius and soleus, which are innervated by the tibial nerve coming from the sacral plexus. The motor roots that primarily drive this action are S1 (and to a lesser extent S2). In clinical testing, weakness of plantar flexion or a diminished Achilles reflex points to S1–S2 function. Other root levels listed do not primarily govern these muscles—their main roles are different parts of the leg and lower limb innervation. Therefore, the root level most consistent with plantar flexion via these muscles is S1 (with contribution from S2).

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