Table 2.

Study Characteristics

Author, year	Des ign	Sample size	Subject Criteria	Follow-Up	Procedure	Group	Outcomes
Guo et al. 2020	E	45	Big-ear rabbit from Laboratory Animal Research Center of the Hospital	3 weeks	Intraparitoneal injection	Normal saline BMSCs Sham Triceps weight Amplitudo and latency of CMAP Histopathology nerve tissue with HE Stain
Huanxing et al. 2013	E	24	Adult female Sprague-Dawley rat weight 220 – 250 grams	16 weeks	Musculocutaneus nerve injection	hi-UMC Vehicle injection EMG measurement whole-cell patch-clamp record biceps NMJ
Rodriguez et al. 2021	E	42	Adult male Wistar Lewis rat 335.13 ± 35.71 grams and 80 ± 10 days old	12 weeks	Phrenicus transfer with Musculocutaneous graft	Autograft ANA ANA + BMSCs Biceps contraction Amplitudo dan latency of CMAP Histological analysis of biceps dan nerve graft with electron microscope and fluorosence
Yang et al. 2019	E	18	Adult male Sprague-Dawley rat weight 200-300 grams six weeks old	16 weeks	Contralateral transfer of C7 to C5-C6	Autograft ANA ANA + dASCs grooming test Amplitudo of CMAP Nerve IHC analysis Axon density Muscle morphology

E: experimental

BMSCs: bone marrow mesenchymal stem cells

CMAP: compound muscle action potential

hi-UMC: human induced umbilical cord mesenchymal cells

EMG: electromyography

NMJ: neuromuscular junction

ANA: acellular nerve allograft

dASCs: differentiated adipose stem cells

IHC: immunohistochemistry