Investigation of muscle spindle distribution on the two muscular compartments of human flexor carpi ulnaris

Objective To reveal feature of morphology of human flexor carpi ulnaris(FCU) by investigating muscle spindle distribution of ulnaris compartment and radial compartment. Methods The muscle spindle distribution of 5 cadavers was used to study by HE staining technique and stereology method. Results Muscle spindle density of ulnar compartment of FCU is bigger than radial compartment of it. Conclusions The muscle spindle density of ulnar compartment is much higher than radial compartment. It was inferred that the sensitivity of drawing of ulnar compartment is higher than radial compartment.