Anatomy and supply. The thenar musculature consists of four muscles located on the radial side of the palm. Together they form the 'ball' of the thumb known as the thenar eminence. They originate at different carpal bones and distally attach to the thumb. The thenar muscles are: Abductor pollicis brevis muscle: arises from the tubercles of the scaphoid and trapezium, and from the flexor retinaculum.
Steps. 1  1. Choose the proper time to prune lemon trees. 2  2. Remove all fruit from the tree. 3  3. Prune any branches that are damaged or diseased all the way back to the base.  4. Cut any branches that are smaller than the diameter of a 1  pencil. 5. Prune suckers as they appear at any time.  6. Decide if you want an open, compact, or hedge type tree look.
Planting Citrus Trees. Full sun is best. Trees should be 15 feet from any structure. Citrus trees should be pruned yearly around Christmas time or right after the last freeze. Some people seem to be happy with a 20 to 30 foot tree. Trees this tall are a huge hassle to harvest. Ideal height is to reach the fruit you harvest off of a 6 foot ladder. Trees should be free of limbs 2 to 3 feet off the ground. New trees have a tendency to make low shoots or branches.