After a bad fall while rock climbing, Charisa experienced profound alterations in her ability to initiate voluntary movements, such as moving her eyes or reaching for a cup of water. Which brain structure did Charisa's injuries most likely affect?

substantia nigra

Explanation:

Substantia nigra -

It refers to the basal ganglia structure which is present in the midbrain , whose main function is movement and reward , is referred to as the substantia nigra .

The ability of not able to perform any voluntary movement , indicates the malfunctioning of the substantia nigra .

Hence , from the given scenario of the question ,

The correct answer is substantia nigra .

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