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Preface vii
Chapter 1 Background 1
What Role did chance play in our origin? 1
How much did internal factors influences our evolution? 2
Are fruit flies really our kissing cousins? 11
Chapter 2 Symmetry and Asymmetry 17
Why are we symmetric outside but asymmetric inside? 17
Is visceral Asymmetry due to molecular chirality? 20
Why do fingerprints violate mirror symmetry? 25
Why do blood vessels violate mirror symmetry? 25
How have animals evolved external asymmetries? 27
Chapter 3 Mysteries of the Midline 33
Why do optic nerves cross the midline? 33
Why do pre-motor nerves cross the midline? 35
Why do symmetric organs fuse at the midline? 37
Where did the neural crest come from? 38
How did our third eye become our pineal gland? 39
Are human cyclopes evolutionary throwbacks? 40
Why do conjoined twins tend to be symmetric? 41
What causes identical twinning? 44
Is twinning ever adaptive? 46
Chapter 4 Merism and Modularity 49
What makes the thumb our only opposable digit? 49
Could we evolve a giant digit like pterosaurs? 53
Where did our tail go? 57
Why do our teeth have different shapes? 60
Why are some features easier to evolve than others? 60
How do upper and lower teeth achieve quasi-symmetry? 62
Why do our ears start out on our neck? 65
Why is our arm built like our leg? 67
Why does our arm differ from our leg? 69
Could centaurs (or similar hexapods) ever evolve? 71
When did we gain the upper hand? 72
How did evolution sculpt our foot? 73
Chapter 5 Sexual Dimorphisms 75
Why do men and women differ in size and shape? 75
Why does our species have as many males as females? 81
Were we all once hermaphrodites? 84
Why domale fetuses make incipient oviducts? 86
How did we become the only "naked apes"? 91
Why are men hairier than women? 92
Why do only men go bald? 96
Why do men have nipples? 98
How did women end up with only two breasts? 101
Chapter 6 Silly, Stupid, and Dangerous Quirks 105
Could choking have been avoided? 105
Why are our retinas inside out? 115
Why is childbirth so precarious? 123
Why are crowded teeth so common? 125
Is our appendix on the road to oblivion? 127
Why do we make a yolk sac if we have no yolk? 128
Why can't we regrow arms or legs? 129
Chapter 7 Mind and Brain 131
How did humans acquire intelligence? 132
Why did humans acquire intelligence? 136
Is intelligence attributable to brain size? 140
Did we ascend from brute to aesthete suddenly or gradually? 142
Epilogue 145
Appendix Quirks of Human Behavior 147
References 153
Index 239
| Price | Condition | Delivery | Seller | Action |
| $115.00 | Digital |
| WonderClub |
Alex Sansone
reviewed Quirks of Human Anatomy: An Evo-Devo Look at the Human Body on February 28, 2017
Quirks of Human Anatomy
Disturbingly simple depiction of the mind. Johnson is unquestionably in awe of the brain. His awe seems to have impaired his skepticism. The result is that he sensationalized what he learned and at times provided absolutely false information as if it were fact.
For example, He is under the assumption that the better people are at reading emotions, the more extroverted. Where is the evidence for such an absurd claim? This is why extraverts often misdiagnose introverts with autism, when in fact they are not even on the spectrum. Worse, despite being around some of the most respected neuroscientists the world has to offer, he was still holding tight to the myth that people only use 10% of their brains. It's absurd. These are only two examples of the many. He really didn't have a good enough grasp of neuroscience to write this book. Some journalists and science writers can swing it, but he is not nearly skeptical enough to pull it off.
The book's target audience seems to be those who also have no education in the neurosciences. Sadly, those people will believe what he is saying because he included work from very respected researchers who have conducted some pretty good studies. He related their work as well as many of his own assumptions. The very way in which he ties together the bits of information he gleaned from the researchers really demonstrates his lack of understanding. For him to have written a book to educate others seems grossly irresponsible. I would highly suggest finding an introductory book written by an actual scientist instead.
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