- long head: infraglenoid tubercle of scapula to olecranon process. functions in joint stability (shunt muscle) - medial head: dorsal surface of humerus to olecranon process.most active of the head in all three positions.- lateral head: dorsal surface of humerus to olecranon process.Strongest, but only active against resistance.unctions in joint stability (shunt muscle) - medial head: dorsal surface of humerus to olecranon process. most active of the head in all three positions. - lateral head: dorsal surface of humerus to olecranon process. Strongest, but only active against resistance.
The ES 500 is a great little backup unit. Easy to use, long battery life (about 25 min. with a desktop PC plugged in; 2 hrs. with a notebook PC plugged into it). It includes full surge protector capabilities, so you won't need to buy another one of those.
The real killers of lithium batteries(the kind in your phone), is heat & frequent full discharge/recharge cycles. They have a design life of 3 ~ 5 years, & will last much longer if not subjected to frequent discharge cycles below 40% of capacity. Apple recommends you let your battery fully discharge/recharge once a month...every couple of months will be just fine. So, to maximize your battery life, charge your phone as often as possible & avoid high heat.