PMID- 26914759
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160226
LR  - 20200930
IS  - 2197-1153 (Print)
IS  - 2197-1153 (Electronic)
IS  - 2197-1153 (Linking)
VI  - 1
IP  - 1
DP  - 2014 Dec
TI  - Bulk effect of the deltoid muscle on the glenohumeral joint.
PG  - 14
LID - 10.1186/s40634-014-0014-9 [doi]
LID - 14
AB  - BACKGROUND: There remains controversy on the role of the deltoid on glenohumeral 
      translations during basic and pitching motions. We thus studied the passive 
      effect of the deltoid on the deltoid glenohumeral joint center (GHJC). METHODS: 
      Six shoulders were tested using an automated mechanical system. A baseline motion 
      pattern of the intact specimen was contrasted with glenohumeral translation after 
      removal of the deltoid. Each condition was evaluated in abduction (ABD) and an 
      abbreviated throwing motion (ATM) using retro-reflective, bone-embedded markers. 
      The absolute trajectory and the area under the curve (AUC) for each motion were 
      calculated and glenohumeral kinematics with respect to the GH translation were 
      compared. RESULTS: The removal of the deltoid resulted in significant changes of 
      the GH translation. During 30-60 degrees  of ABD, it resulted in a superior and more 
      anterior GH translation, while in the 60-90 degrees  segment in a more inferior and 
      medial GH translation. During 90-120 degrees , the GH translation was medialized. In the 
      pitching motion from maximum external rotation to 90 degrees  of external rotation (ER), 
      the removal of the deltoid resulted in a more superior, anterior and lateral GH 
      translation. Thus limits anterior translation in the abduction-external rotation 
      position. In the remaining segments (90-80 degrees  and 80-45 degrees  of ER), it resulted in a 
      lateralization of the GH translation. CONCLUSIONS: Modelling the throwing 
      shoulder, the deltoid has a significant influence on glenohumeral motion. 
      Athletes with deltoid dysfunction and limited range of motion are at risk for 
      injury due to the resulting change in their throwing mechanics.
FAU - Rosso, Claudio
AU  - Rosso C
AD  - Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center and 
      Harvard Medical School, Boston, MA, USA. C.Rosso@arthro.ch.
AD  - Orthopaedic Department, University Hospital Basel and University of Basel, Basel, 
      Switzerland. C.Rosso@arthro.ch.
AD  - Altius Swiss Sportsmed Center, Rheinfelden, Switzerland. C.Rosso@arthro.ch.
FAU - Mueller, Andreas M
AU  - Mueller AM
AD  - Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center and 
      Harvard Medical School, Boston, MA, USA. muelleram76@gmail.com.
AD  - Orthopaedic Department, University Hospital Basel and University of Basel, Basel, 
      Switzerland. muelleram76@gmail.com.
FAU - McKenzie, Brett
AU  - McKenzie B
AD  - Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center and 
      Harvard Medical School, Boston, MA, USA. bmckenz510@gmail.com.
FAU - Entezari, Vahid
AU  - Entezari V
AD  - Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center and 
      Harvard Medical School, Boston, MA, USA. ventezari@gmail.com.
FAU - Cereatti, Andrea
AU  - Cereatti A
AD  - Information Engineering Unit, POLCOMING Department, University of Sassari, 
      Sassari, Italy. acereatti@uniss.it.
FAU - Della Croce, Ugo
AU  - Della Croce U
AD  - Information Engineering Unit, POLCOMING Department, University of Sassari, 
      Sassari, Italy. dellacroce@uniss.it.
FAU - Ramappa, Arun J
AU  - Ramappa AJ
AD  - Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Harvard 
      Medical School, 330 Brookline Avenue, Stoneman 10, Boston, 02215, MA, USA. 
      aramappa@bidmc.harvard.edu.
FAU - Nazarian, Ara
AU  - Nazarian A
AD  - Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center and 
      Harvard Medical School, Boston, MA, USA. anazaria@bidmc.harvard.edu.
FAU - DeAngelis, Joseph P
AU  - DeAngelis JP
AD  - Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Harvard 
      Medical School, 330 Brookline Avenue, Stoneman 10, Boston, 02215, MA, USA. 
      jpdeange@bidmc.harvard.edu.
LA  - eng
PT  - Journal Article
DEP - 20141104
PL  - United States
TA  - J Exp Orthop
JT  - Journal of experimental orthopaedics
JID - 101653750
PMC - PMC4546007
OTO - NOTNLM
OT  - Biomechanics
OT  - Bulk effect
OT  - Deltoid muscle
OT  - Motion analysis
OT  - Pitching
OT  - Shoulder
EDAT- 2014/12/01 00:00
MHDA- 2014/12/01 00:01
PMCR- 2014/11/04
CRDT- 2016/02/26 06:00
PHST- 2014/06/13 00:00 [received]
PHST- 2014/08/31 00:00 [accepted]
PHST- 2016/02/26 06:00 [entrez]
PHST- 2014/12/01 00:00 [pubmed]
PHST- 2014/12/01 00:01 [medline]
PHST- 2014/11/04 00:00 [pmc-release]
AID - 10.1186/s40634-014-0014-9 [pii]
AID - 14 [pii]
AID - 10.1186/s40634-014-0014-9 [doi]
PST - ppublish
SO  - J Exp Orthop. 2014 Dec;1(1):14. doi: 10.1186/s40634-014-0014-9. Epub 2014 Nov 4.