Template:Hewer1935 table 2: Difference between revisions
From Embryology
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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 | ||
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|- | |- | ||
| | | | ||
| Beginning Pacinian | | Beginning {{Pacinian corpuscle}} | ||
| — | | — | ||
| [[Second Trimester|20]] | | [[Second Trimester|20]] | ||
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|- | |- | ||
| | | | ||
| Pacinian | | {{Pacinian corpuscle}} well developed | ||
| — | | — | ||
| [[Third Trimester|26]]-[[Third Trimester|28]] | | [[Third Trimester|26]]-[[Third Trimester|28]] | ||
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| | | | ||
| Plates begin to differentiate | | Plates begin to differentiate | ||
| | | [[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) '''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 10:01, 27 June 2018
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 |
- ↑ Hewer EE. The development of nerve endings in the human foetus. (1935) J Anat. 69(3):369-79. PMID 17104543