Popliteal aery pulsations are difficult to feel because

Popliteal aery is difficult to feel.It is palpated better in prone position with knee flexed about 40-50 degree,to relax the popliteal fascia.It is felt in the lower pa of the fossa over the flat posterior surface of upper end of tibia.In upper end of the fossa,aery is not felt as there is no bony area in intercondylar region. Refer page no173 of SRB's manual of surgery 5 th edition.