Sentence:  On motor examination, she had normal bulk and tone throughout the upper and lower <WSD>extremities</WSD>. Her upper <WSD>extremity</WSD> strength appeared symmetric bilaterally and no drift in the left upper <WSD>extremity</WSD> was found. In the lower <WSD>extremities</WSD>, she had full strength in the right leg. In the left leg, there was some subtle weakness of left hip flexion, with 5/5 strength distally. 
Meaning of the word marked with <WSD> tags:  A (wing). (from early 15th c.)