Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\24753475
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Anat+Rec+(Hoboken)
2014 ; 297
(6
): 1009-21
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Enigmatic cranial superstructures among Chamorro ancestors from the Mariana
Islands: gross anatomy and microanatomy
#MMPMID24753475
Heathcote GM
; Bromage TG
; Sava VJ
; Hanson DB
; Anderson BE
Anat Rec (Hoboken)
2014[Jun]; 297
(6
): 1009-21
PMID24753475
show ga
This study focuses on the gross anatomy, anatomic relations, microanatomy, and
the meaning of three enigmatic, geographically patterned, and quasi-continuous
superstructures of the posterior cranium. Collectively known as occipital
superstructures (OSSs), these traits are the occipital torus tubercle (TOT),
retromastoid process (PR), and posterior supramastoid tubercle (TSP). When
present, TOT, PR, and TSP develop at posterior cranial attachment sites of the
upper trapezius, superior oblique, and sternocleidomastoid muscles, respectively.
Marked expression and co-occurrence of these OSSs are virtually circumscribed
within Oceania and reach highest recorded frequencies in protohistoric Chamorros
(CHamoru) of the Mariana Islands. Prior to undertaking scanning electron
microscopy (SEM) work, our working multifactorial model for OSS development was
that early-onset, long-term, and chronic activity-related microtrauma at enthesis
sites led to exuberant reactive or reparative responses in a substantial minority
of genetically predisposed (and mostly male) individuals. SEM imaging, however,
reveals topographic patterning that questions, but does not negate, activity
induction of these superstructures. Although OSSs appear macroscopically as
relatively large and discrete phenomena, SEM findings reveal a unique,
widespread, and seemingly systemic distribution of structures over the occipital
surface that have the appearance of OSS microforms. Nevertheless, apparent
genetic underpinnings, anatomic relationships with muscle entheses, and positive
correlation of OSS development with humeral robusticity continue to suggest that
these superstructures have potential to at once bear witness to Chamorro
population history and inform osteobiographical constructions of chronic activity
patterns in individuals bearing them. Further work is outlined that would
illuminate the proximate and ultimate meanings of OSS.