Template:Hewer1935 table 2: Difference between revisions

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! Motor nerve endings
! Motor nerve endings
! Human (approximate age) weeks  
! Human (approximate age) weeks  
! Chick (Tello)  (approximate age) days
! [[Chicken Development|Chick]] (Tello)  (approximate age) days
|-
|-
| Beginning differentiation  
| Beginning differentiation  
|  —  
|  —  
| —
| —
| 7  
| [[Week 7|7]]
| 5
| 5
|-bgcolor="F5FAFF"
|-bgcolor="F5FAFF"
| Myofibrils appear  
| Myofibrils appear  
| Colspan=2| Exploratory fibres with bulbous endings penetrate into muscles
| Colspan=2| Exploratory fibres with bulbous endings penetrate into muscles
| 8  
| [[Week 8|8]]
| 6
| 6
|-  
|-  
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| Isolated “fat” fibres
| Isolated “fat” fibres
| -
| -
|
| —  
| —  
| 10-12  
| [[Week 10|10]]-[[Fetal Development - 12 Weeks|12]]
| 7  
| 7  
|-
|-
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| Varicose endings in contact with myotubes
| Varicose endings in contact with myotubes
| -
| -
| 10  
| [[Week 10|10]]
| —   
| —   
|-
|-bgcolor="F5FAFF"
| Tendon fibres diflerentiate  
| Tendon fibres diflerentiate  
| —  
| —  
| —  
| —  
| 12  
| [[Fetal Development - 12 Weeks|12]]
| 10  
| 10  
|-
|-
|  
|  
| Beginning Pacinian bodies
| Beginning {{Pacinian corpuscle}}
|
| —  
| —  
| 20  
| [[Second Trimester|20]]
| 11  
| 11  
|-
|-bgcolor="F5FAFF"
| Multiplication of myotubes  
| Multiplication of myotubes  
| —  
| —  
| -  
| -  
| 12-22  
| [[Fetal Development - 12 Weeks|12]]-[[Second Trimester|22]]
| 9-13  
| 9-13  
|-
|-
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| Spindles differentiate
| Spindles differentiate
| -
| -
| 20  
| [[Second Trimester|20]]
| 12  
| 12  
|-
|-bgcolor="F5FAFF"
| Dissociation of myotubes from one another. Nuclei become peripheral
| Dissociation of myotubes from one another. Nuclei become peripheral
| Spindles become complex
| Spindles become complex
| —  
| —  
| 22-26  
| [[Second Trimester|22]]-[[Third Trimester|26]]
| 13
| 13
|-
|-
|  
|  
| Pacinian bodies well developed
| {{Pacinian corpuscle}} well developed
| —  
| —  
| 26-28  
| [[Third Trimester|26]]-[[Third Trimester|28]]
| 15   
| 15   
|-
|-bgcolor="F5FAFF"
|
|
|
|
| Plates begin to differentiate
| Plates begin to differentiate
| 26-28 (very rudimentary except tongue)
| [[Third Trimester|26]]-[[Third Trimester|28]]  (very rudimentary except tongue)
| 18
| 18
|-
|-
| Data: Hewer (1935)<ref name=Hewer1935>{{Ref-Hewer1935}}</ref>
| colspan=5|Data: Hewer (1935)<ref name=Hewer1935>{{Ref-Hewer1935}}</ref> (human weeks appear to be fertilization age based on CRL)&nbsp;&nbsp;&nbsp;'''Links:''' {{timeline}} | {{chicken}} | {{skeletal muscle}}
|}<noinclude>[[Category:Template]][[Category:Table]][[Category:Historic Embryology]][[Category:1930's]][[Category:Neural]][[Category:Timeline]]</noinclude>
|}<noinclude>[[Category:Template]][[Category:Table]][[Category:Historic Embryology]][[Category:1930's]][[Category:Neural]][[Category:Timeline]]</noinclude>

Latest revision as of 11:01, 27 June 2018

Comparison Human and Chick Neural Endings Timeline
Striped muscle and tendon Sensory nerve endings Motor nerve endings Human (approximate age) weeks Chick (Tello) (approximate age) days
Beginning differentiation 7 5
Myofibrils appear Exploratory fibres with bulbous endings penetrate into muscles 8 6
Great increase of connective tissue. Vast numbers of nuclei - - - 6-7
Isolated “fat” fibres - 10-12 7
Varicose endings in contact with myotubes - 10
Tendon fibres diflerentiate 12 10
Beginning pacinian corpuscle 20 11
Multiplication of myotubes - 12-22 9-13
Spindles differentiate - 20 12
Dissociation of myotubes from one another. Nuclei become peripheral Spindles become complex 22-26 13
pacinian corpuscle well developed 26-28 15
Plates begin to differentiate 26-28 (very rudimentary except tongue) 18
Data: Hewer (1935)[1] (human weeks appear to be fertilization age based on CRL)   Links: timeline | chicken | skeletal muscle