Halakhah for Chullin 191:10
ואילו אמרי
R'JUDAH SAYS, ONLY SO MUCH AS IS NECESSARY TO FULFIL THE PRECEPT OF REMOVING IT.<span class="x" onmousemove="('comment',' It is sufficient if one removes the upper part of the nerve, i.e., that part which is visible at the hip-joint.');"><sup>4</sup></span>
Sefer HaChinukh
And [it] is practiced in every places and at all times by males and by females. And one who transgresses it and eats a [whole sciatic nerve], even if it is less than an olive's-worth - or eats a kazayit (the size of a large olive) from a large sciatic nerve - is lashed (see Chullin 96a).
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