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Sex differences in spinal excitability during observation of bipedal locomotion. 2007

Yawei Cheng, and Jean Decety, and Ching-Po Lin, and Jen-Chuen Hsieh, and Daisy Hung, and Ovid J L Tzeng
Department of Physical Medicine and Rehabilitation, Taipei City Hospital, Taipei, Taiwan. yaweicheng@gmail.com

This study investigated whether there are sex differences in the spinal excitability of the human mirror-neuron system. We measured the modulation of spinal excitability, elicited by Hoffmann reflex in the left plantar flexor muscle (soleus), when women and men participants observed videos of bipedal heel-stepping (plantar dorsiflexion), standing still, and bipedal toe-stepping (plantar flexion). Men and women were similarly divided in their sex judgments of the observed legs. Our results indicate that whereas both men and women mimicked spinal excitability to the observed bipedal step, only women participants produced stronger modulation of spinal excitability. These findings demonstrate that the human mirror-neuron system exhibits sex differences in spinal excitability.

UI MeSH Term Description Entries
D007839 Functional Laterality Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot. Ambidexterity,Behavioral Laterality,Handedness,Laterality of Motor Control,Mirror Writing,Laterality, Behavioral,Laterality, Functional,Mirror Writings,Motor Control Laterality,Writing, Mirror,Writings, Mirror
D008124 Locomotion Movement or the ability to move from one place or another. It can refer to humans, vertebrate or invertebrate animals, and microorganisms. Locomotor Activity,Activities, Locomotor,Activity, Locomotor,Locomotor Activities
D008297 Male Males
D010775 Photic Stimulation Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity. Stimulation, Photic,Visual Stimulation,Photic Stimulations,Stimulation, Visual,Stimulations, Photic,Stimulations, Visual,Visual Stimulations
D003071 Cognition Intellectual or mental process whereby an organism obtains knowledge. Cognitive Function,Cognitions,Cognitive Functions,Function, Cognitive,Functions, Cognitive
D005260 Female Females
D006181 H-Reflex A monosynaptic reflex elicited by stimulating a nerve, particularly the tibial nerve, with an electric shock. H Reflex,H-Reflexes,H Reflexes,Reflex, H
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D012727 Sex Characteristics Those characteristics that distinguish one SEX from the other. The primary sex characteristics are the OVARIES and TESTES and their related hormones. Secondary sex characteristics are those which are masculine or feminine but not directly related to reproduction. Gender Characteristics,Gender Differences,Gender Dimorphism,Sex Differences,Sex Dimorphism,Sexual Dichromatism,Sexual Dimorphism,Characteristic, Gender,Characteristic, Sex,Dichromatism, Sexual,Dichromatisms, Sexual,Difference, Sex,Dimorphism, Gender,Dimorphism, Sex,Dimorphism, Sexual,Gender Characteristic,Gender Difference,Gender Dimorphisms,Sex Characteristic,Sex Difference,Sex Dimorphisms,Sexual Dichromatisms,Sexual Dimorphisms

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