Table 1.

Histological examinations of the median nerve in the arm, forearm, and wrist.

Mean ± SD	Arm	Forearm	Wrist
Epineurium thickness (μm)	3.3 ± 2.1	8.36 ± 3.53*	4.52 ± 2.07
Perineurium thickness (μm)	2.60 ± 2.42	6.08 ± 1.35*	2.25 ± 0.15
Number of fascicles per nerve trunk	9.50 ± 1.29	8.75 ± 1.71	8.38 ± 2.17
Area percent of myelin covering	5.28 ± 3.05	1.62 ± 1.05#	4.0 ± 2.40
Area percent of neurolemmal sheath	11.52 ± 2.13	12.95 ± 4.19	11.67 ± 3.03

^* significant increase compared to the arm group and wrist group;

^#significant decrease compared to the arm group and wrist group.