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.
Environmental issues. Drought stress is the most common cause of leaf curl in citrus, but also the easiest to remedy. If leaves begin to curl inward while retaining their green coloration and the soil around your tree feels dry to the touch, youâre not watering enough.Stepping up watering efforts and applying two to four inches of an organic mulch to the ground around your citrus plant will help it recover.f leaves begin to curl inward while retaining their green coloration and the soil around your tree feels dry to the touch, youâre not watering enough. Stepping up watering efforts and applying two to four inches of an organic mulch to the ground around your citrus plant will help it recover.