User:Chorba.12/sandbox

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Assignment II
Edited Page: https://en.wikipedia.org/wiki/Thumb

Three suggestions: First, this article could be improved by taking a more in depth look at anatomical differences between modern humans and their distant primate relatives. Modern humans are unique in the musculature of their forearm and hand. Yet, they remain autapomorphic, meaning each muscle is found in one or more non-human primates. The extensor pollicis brevis and flexor pollicis longus allow modern humans to have great manipulative skills and strong flexion in the thumb.

Secondly, this article has a very clear depiction that bipedalism evolved after and maybe a result of “busy hands.” However, there are several studies that support the exact opposite. That walking allowed hands to become free for other activities and as a result hand movements became more complex. The complex movements then in turn made stone technology possible.

Lastly, the article could have expanded on the evolutionary history of the thumb.

Sentence Added: Modern humans are unique in the musculature of their forearm and hand. Yet, they remain autapomorphic, meaning each muscle is found in one or more non-human primates. The extensor pollicis brevis and flexor pollicis longus allow modern humans to have great manipulative skills and strong flexion in the thumb.

Cite: Diogo, R., Richmond, B. G., & Wood, B. (January 01, 2012). Evolution and homologies of primate and modern human hand and forearm muscles, with notes on thumb movements and tool use. Journal of Human Evolution, 63, 1, 64-78.