Anatomical analysis of thumb opponency movement in the capuchin monkey (Sapajus sp)
PLoS ONE, ISSN: 1932-6203, Vol: 9, Issue: 2, Page: e87288
2014
- 17Citations
- 29Captures
- 1Mentions
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Metrics Details
- Citations17
- Citation Indexes17
- 17
- CrossRef6
- Captures29
- Readers29
- 29
- Mentions1
- Blog Mentions1
- Blog1
Article Description
Capuchin monkeys present a wide variety of manipulatory skills and make routine use of tools both in captivity and in the wild. Efficient handling of objects in this genus has led several investigators to assume near-human thumb movements despite the lack of anatomical studies. Here we perform an anatomical analysis of muscles and bones in the capuchin hand. Trapezo-metacarpal joint surfaces observed in capuchins indicate that medial rotation of metacarpal I is either absent or very limited. Overall, bone structural arrangement and thumb position relative to the other digits and the hand's palm suggest that capuchins are unable to perform any kind of thumb opponency, but rather a 'lateral pinch' movement. Although the capuchin hand apparatus bears other features necessary for complex tool use, the lack thumb opposition movements suggests that a developed cognitive and motor nervous system may be even more important for high manipulatory skills than traditionally held. © 2014 Aversi-Ferreira et al.
Bibliographic Details
10.1371/journal.pone.0087288; 10.1371/journal.pone.0087288.t001; 10.1371/journal.pone.0087288.g005; 10.1371/journal.pone.0087288.t002; 10.1371/journal.pone.0087288.g001; 10.1371/journal.pone.0087288.g004; 10.1371/journal.pone.0087288.g006; 10.1371/journal.pone.0087288.g003; 10.1371/journal.pone.0087288.g002
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