Which lower limb artery is difficult to palpate

POPLITEAL ARTERY :- Continuation of femoral artery. Begins at adductor hiatus. Runs downwards and laterally to reach lower border of popliteus. Terminates by dividing into anterior and posterior tibial arteries. Relations:- 1. Anteriorly- popliteal surface of femur, back of knee joint, fascia covering popliteus. 2. Posterior - tibial nerve. 3. Lateral- biceps femoris, plantaris, lateral head of gastrocnemius and lateral condyle of femur. 4. Medial-semimembranosus, medial condyle of femur. Branches:- 1. Muscular- adductor Magnus, hamstrings, gastrocnemius, soleus, plantaris. 2. Cutaneous 3. Genicular- superior, middle and inferior.   Middle -pierces oblique popliteal ligament. Supplies cruciate ligament and synovial membrane of knee joint. BP of lower limb measured from popliteal artery. In coarctation of aorta, popliteal pressure < brachial pressure. Popliteal artery is fixed to capsule of knee joint by a fibrous band present just above the femoral condyles. This may be a source of continuous traction or stretching in the artery, causing primary thrombosis of artery. More prone to aneurysm. Dorsalis pedis- can be easily at proximal end of first intermetatarsal space. i.e .between the tendons of EHL and first tendon of EDL. Anterior tibial artery- palpable at midway between two malleolus  Posterior tibial artery- pulsation felt at 2 cm behind and below medial malleolus.