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.
The tree will adapt to lower light conditions, but if you are after fruit production, the citrus needs direct sunlight (five to six hours a day). Plant the citrus tree in soil with a considerable amount of organics such as leaf mold, peat moss (Use peat in the soil mix to keep the pH down) or compost. A mix of one-third sterile potting soil, one-third peat and one-third organic matter works well. Relative humidity is an important factor in the growth of citrus.