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Concentric Finger Flexion Against Resistance

In this video, the motion of finger flexion is occurring at the metacarpophalangeal (MCP) and interphalangeal (IP) joints while squeezing the ball. This motion is controlled by concentric muscle contraction against the resistance from the ball. Concentric metacarpophalangeal (MCP) and interphalangeal (IP) joint flexion is demonstrated from a position of 90⁰ of elbow flexion as seen from a front or anterior view.

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Leslie Samuel is the creator of Interactive Biology. His mission is to use this site to Make Biology fun for people all over the world.

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5 Responses to “Concentric Finger Flexion Against Resistance”

  1. Malibumal418 April 2, 2013 at 12:10 pm #

    Hi, I’m really confused on the secretion of melatonin! Does it come from the pineal gland or ganglion cell, or are they both the same thing? I’m soooooo confused, please help me

  2. 369thegoose1 April 15, 2013 at 9:18 pm #

    I’ve recently stumbled upon your videos. They are AMAZING!!! Thank you so much!!!! I watch your videos all the time!! Never EVER stop posting them. You wouldn’t believe the incredible help you give your viewers!!!! Thank you! Thank you! Thank you!

  3. Womb2Tomb1 April 30, 2013 at 9:26 pm #

    where is leslie damnit!

  4. Farhaan Nasar July 13, 2013 at 5:31 am #

    pineal body secretes melatonin :D

  5. Farhaan Nasar July 13, 2013 at 5:31 am #

    pineal body secretes melatonin :D