goosebattle

goosebattle t1_jdt7tbi wrote

Important follow up question? What popular dance moves could an elephant do? The Charleston, the mashed potato, the twist, or flossing for example? Can you teach an elephant how to Dougie? Or a choreographed routine such as the macarena, chicken dance, or hokey pokey?

Edit: jazz hands, spirit fingers, and Bollywood are unlikely as elephants lack hands to perform the requisite movements. Twerking is on the table though, but perhaps not literally.

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goosebattle t1_j4m0zj0 wrote

Motor units (and single muscle cells) are almost operating as on/off. There is some minor modulation possible with changes in firing frequency. Each muscle has many (typically >>100) motor units varying in size, each with an on/off switch. The net result of having so many motor units is the muscle behaves as if it is operating with a dimmer switch.

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goosebattle t1_j4kvw57 wrote

This is incorrect. Our muscles fire in a mosaic pattern, not as fascicles. Fibre type grouping occurs in disease and aging when muscle fibres lose innervation and become reinnervated by near neighbours resulting in the regional firing patterns you describe.

Edit: an advantage of mosiac firing pattern is that it spreads the stresses across the muscle rather than generating regions of high local stresses. Fascicles (i.e., the perimysium) help transmit the stresses from fibres to tendons.

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