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Items: 1 to 50 of 54

1.

Rat bone properties and their relationship to gait during growth.

Song H, Polk JD, Kersh ME.

J Exp Biol. 2019 Sep 6. pii: jeb.203554. doi: 10.1242/jeb.203554. [Epub ahead of print]

PMID:
31492819
2.

An Algorithm for Automated Separation of Trabecular Bone from Variably Thick Cortices in High-Resolution Computed Tomography Data.

Ang IC, Fox M, Polk JD, Kersh ME.

IEEE Trans Biomed Eng. 2019 Jun 21. doi: 10.1109/TBME.2019.2924398. [Epub ahead of print]

PMID:
31247539
3.

Health challenges including behavioral problems in long-duration spaceflight.

Doarn CR, Polk JD, Shepanek M.

Neurol India. 2019 May-Jun;67(Supplement):S190-S195. doi: 10.4103/0028-3886.259116. Review.

4.

BDNF, endurance activity, and mechanisms underlying the evolution of hominin brains.

Hill T, Polk JD.

Am J Phys Anthropol. 2019 Jan;168 Suppl 67:47-62. doi: 10.1002/ajpa.23762. Epub 2018 Dec 21.

PMID:
30575024
5.

Limb dominance, foot orientation and functional asymmetry during walking gait.

Polk JD, Stumpf RM, Rosengren KS.

Gait Posture. 2017 Feb;52:140-146. doi: 10.1016/j.gaitpost.2016.11.028. Epub 2016 Nov 18.

PMID:
27912154
6.

Ontogenetic scaling of fore limb and hind limb joint posture and limb bone cross-sectional geometry in vervets and baboons.

Burgess ML, Schmitt D, Zeininger A, McFarlin SC, Zihlman AL, Polk JD, Ruff CB.

Am J Phys Anthropol. 2016 Sep;161(1):72-83. doi: 10.1002/ajpa.23009. Epub 2016 Jun 2.

PMID:
27252095
7.

THE COMING BUBBLE OF MEDICAL SCHOOL GRADUATES.

Polk JD.

Iowa Med. 2015 Summer;105(3):20-1. No abstract available.

PMID:
26591505
8.

National primary care shortage calls attention to alarming training trends.

Polk JD.

Iowa Med. 2014 Jul-Aug;104(4):10, 27. No abstract available.

PMID:
25226683
9.

ACA implementation signals dynamic changes in physician educational requirements.

Polk JD.

Iowa Med. 2013 Nov-Dec;103(6):25. No abstract available.

PMID:
25188947
10.

Organizations align to secure future of GME. ACGME, AOA, AACOM agree to single accreditation system.

Polk JD.

Iowa Med. 2014 Mar-Apr;104(2):22. No abstract available.

PMID:
25167628
11.

Bosnian refugees: screening and treatment in an immigrant population.

Sabic D, Blattner C, Polk JD.

J Am Osteopath Assoc. 2014 Aug;114(8):617-8. doi: 10.7556/jaoa.2014.126. No abstract available.

PMID:
25082968
12.

Exercise-induced bone formation is poorly linked to local strain magnitude in the sheep tibia.

Wallace IJ, Demes B, Mongle C, Pearson OM, Polk JD, Lieberman DE.

PLoS One. 2014 Jun 4;9(6):e99108. doi: 10.1371/journal.pone.0099108. eCollection 2014.

13.

The primate vaginal microbiome: comparative context and implications for human health and disease.

Stumpf RM, Wilson BA, Rivera A, Yildirim S, Yeoman CJ, Polk JD, White BA, Leigh SR.

Am J Phys Anthropol. 2013 Dec;152 Suppl 57:119-34. doi: 10.1002/ajpa.22395. Epub 2013 Oct 28. Review.

PMID:
24166771
14.

The evolution of locomotor rhythmicity in tetrapods.

Ross CF, Blob RW, Carrier DR, Daley MA, Deban SM, Demes B, Gripper JL, Iriarte-Diaz J, Kilbourne BM, Landberg T, Polk JD, Schilling N, Vanhooydonck B.

Evolution. 2013 Apr;67(4):1209-17. doi: 10.1111/evo.12015. Epub 2012 Dec 20.

PMID:
23550769
15.

Emissary veins and neuroanatomic changes in space.

Kramer LA, Sargsyan AE, Hasan KM, Polk JD, Hamilton DR.

Radiology. 2013 Jan;266(1):363. No abstract available.

PMID:
23390626
16.

Linking brains and brawn: exercise and the evolution of human neurobiology.

Raichlen DA, Polk JD.

Proc Biol Sci. 2013 Jan 7;280(1750):20122250. doi: 10.1098/rspb.2012.2250. Review.

17.

Prophylactic surgery prior to extended-duration space flight: is the benefit worth the risk?

Ball CG, Kirkpatrick AW, Williams DR, Jones JA, Polk JD, Vanderploeg JM, Talamini MA, Campbell MR, Broderick TJ.

Can J Surg. 2012 Apr;55(2):125-31. doi: 10.1503/cjs.024610. Review.

18.

Orbital and intracranial effects of microgravity: findings at 3-T MR imaging.

Kramer LA, Sargsyan AE, Hasan KM, Polk JD, Hamilton DR.

Radiology. 2012 Jun;263(3):819-27. doi: 10.1148/radiol.12111986. Epub 2012 Mar 13.

PMID:
22416248
19.

Parallel Factor Analysis of gait waveform data: A multimode extension of Principal Component Analysis.

Helwig NE, Hong S, Polk JD.

Hum Mov Sci. 2012 Jun;31(3):630-48. doi: 10.1016/j.humov.2011.06.011. Epub 2011 Sep 16.

PMID:
21925756
20.

Optic disc edema, globe flattening, choroidal folds, and hyperopic shifts observed in astronauts after long-duration space flight.

Mader TH, Gibson CR, Pass AF, Kramer LA, Lee AG, Fogarty J, Tarver WJ, Dervay JP, Hamilton DR, Sargsyan A, Phillips JL, Tran D, Lipsky W, Choi J, Stern C, Kuyumjian R, Polk JD.

Ophthalmology. 2011 Oct;118(10):2058-69. doi: 10.1016/j.ophtha.2011.06.021. Epub 2011 Aug 17.

PMID:
21849212
21.

The hidden cost of variability.

Tsai M, Polk JD.

Anesth Analg. 2011 Aug;113(2):431; author reply 431-2. doi: 10.1213/ANE.0b013e318222030c. No abstract available.

PMID:
21788332
22.

Divergent patterns of integration and reduced constraint in the human hip and the origins of bipedalism.

Grabowski MW, Polk JD, Roseman CC.

Evolution. 2011 May;65(5):1336-56. doi: 10.1111/j.1558-5646.2011.01226.x. Epub 2011 Feb 7.

PMID:
21521191
23.

Lean Six Sigma, innovation, and the change acceleration process can work together.

Polk JD.

Physician Exec. 2011 Jan-Feb;37(1):38-42. No abstract available.

PMID:
21302748
24.

The pursuit of knowledge.

Polk JD.

J R Coll Physicians Edinb. 2010 Dec;40(4):290-1. doi: 10.4997/JRCPE.2010.413. No abstract available.

PMID:
21132131
25.

Methods to temporally align gait cycle data.

Helwig NE, Hong S, Hsiao-Wecksler ET, Polk JD.

J Biomech. 2011 Feb 3;44(3):561-6. doi: 10.1016/j.jbiomech.2010.09.015.

PMID:
20887992
26.

Quantifying complexity and variability in phase portraits of gait.

DiBerardino LA 3rd, Polk JD, Rosengren KS, Spencer-Smith JB, Hsiao-Wecksler ET.

Clin Biomech (Bristol, Avon). 2010 Jul;25(6):552-6. doi: 10.1016/j.clinbiomech.2010.03.007.

PMID:
20399549
27.

Body size and joint posture in primates.

Polk JD, Williams SA, Peterson JV.

Am J Phys Anthropol. 2009 Oct;140(2):359-67. doi: 10.1002/ajpa.21083.

PMID:
19425104
28.

Differences in gait complexity and variability between children with and without developmental coordination disorder.

Rosengren KS, Deconinck FJ, Diberardino LA 3rd, Polk JD, Spencer-Smith J, De Clercq D, Lenoir M.

Gait Posture. 2009 Feb;29(2):225-9. doi: 10.1016/j.gaitpost.2008.08.005. Epub 2008 Oct 1.

PMID:
18829321
29.

Human health and performance for long-duration spaceflight.

Baisden DL, Beven GE, Campbell MR, Charles JB, Dervay JP, Foster E, Gray GW, Hamilton DR, Holland DA, Jennings RT, Johnston SL, Jones JA, Kerwin JP, Locke J, Polk JD, Scarpa PJ, Sipes W, Stepanek J, Webb JT; Ad Hoc Committee of Members of the Space Medicine Association; Society of NASA Flight Surgeons.

Aviat Space Environ Med. 2008 Jun;79(6):629-35.

PMID:
18581950
30.

Autonomous medical care for exploration class space missions.

Hamilton D, Smart K, Melton S, Polk JD, Johnson-Throop K.

J Trauma. 2008 Apr;64(4 Suppl):S354-63. doi: 10.1097/TA.0b013e31816c005d. Review.

PMID:
18385587
31.

Knee posture predicted from subchondral apparent density in the distal femur: an experimental validation.

Polk JD, Blumenfeld J, Ahluwalia K.

Anat Rec (Hoboken). 2008 Mar;291(3):293-302. doi: 10.1002/ar.20653. Erratum in: Anat Rec (Hoboken). 2008 Jul;291(7):894. Ahluwalia, D [corrected to Ahluwalia, K].

32.

A new approach to detecting asymmetries in gait.

Shorter KA, Polk JD, Rosengren KS, Hsiao-Wecksler ET.

Clin Biomech (Bristol, Avon). 2008 May;23(4):459-67. doi: 10.1016/j.clinbiomech.2007.11.009. Epub 2008 Feb 1.

PMID:
18242805
33.

Clinical utility of the cobalt-albumin binding assay in the diagnosis of intestinal ischemia.

Polk JD, Rael LT, Craun ML, Mains CW, Davis-Merritt D, Bar-Or D.

J Trauma. 2008 Jan;64(1):42-5. doi: 10.1097/TA.0b013e31815b846a.

PMID:
18188097
34.

Human spaceflight health systems for the Constellation Project.

Scheuring RA, Jones JA, Polk JD.

Aviat Space Environ Med. 2007 Dec;78(12):1179-80. No abstract available.

PMID:
18064927
35.

Quantifying variability in phase portraits: application to gait ontogeny.

Polk JD, Spencer-Smith J, DiBerardino L, Ellis D, Downen M, Rosengren KS.

Infant Behav Dev. 2008 Apr;31(2):302-6. Epub 2007 Nov 28.

PMID:
18048098
36.

Forelimb and hindlimb forces in walking and galloping primates.

Hanna JB, Polk JD, Schmitt D.

Am J Phys Anthropol. 2006 Aug;130(4):529-35.

PMID:
16425190
37.

Trabecular bone in the bird knee responds with high sensitivity to changes in load orientation.

Pontzer H, Lieberman DE, Momin E, Devlin MJ, Polk JD, Hallgrímsson B, Cooper DM.

J Exp Biol. 2006 Jan;209(Pt 1):57-65.

38.

Sampling frequencies and measurement error for linear and temporal gait parameters in primate locomotion.

Polk JD, Psutka SP, Demes B.

J Hum Evol. 2005 Dec;49(6):665-79. Epub 2005 Sep 15.

PMID:
16168461
40.

Fetal evaluation for transport by ultrasound performed by air medical teams: A case series.

Polk JD, Merlino JI, Kovach BL, Mancuso C, Fallon WF Jr.

Air Med J. 2004 Jul-Aug;23(4):32-4.

PMID:
15224080
41.

Predicting long bone loading from cross-sectional geometry.

Lieberman DE, Polk JD, Demes B.

Am J Phys Anthropol. 2004 Feb;123(2):156-71.

PMID:
14730649
42.

Optimization of bone growth and remodeling in response to loading in tapered mammalian limbs.

Lieberman DE, Pearson OM, Polk JD, Demes B, Crompton AW.

J Exp Biol. 2003 Sep;206(Pt 18):3125-38.

43.

Patient trauma outcomes after discontinuation of hospital-based air transport service.

Fallon W Jr, Mancuso C, McSwain N Jr, Merlino J, Polk JD, Scalea T.

J Trauma. 2003 Mar;54(3):629; author reply 629-30. No abstract available.

PMID:
12634553
44.
45.

Central retinal artery occlusion by proxy: a cause for sudden blindness in an airline passenger.

Polk JD, Rugaber C, Kohn G, Arenstein R, Fallon WF Jr.

Aviat Space Environ Med. 2002 Apr;73(4):385-7.

PMID:
11952061
46.

Prehospital tracheal intubating conditions during rapid sequence intubation: rocuronium versus vecuronium.

Smith CE, Kovach B, Polk JD, Hagen JF, Fallon WF Jr.

Air Med J. 2002 Jan-Feb;21(1):26-32.

PMID:
11805764
47.

Intubated pediatric patients requiring transport: a review of patients, indications, and standards.

Nieman CT, Merlino JI, Kovach B, Polk JD, Mancuso C, Fallon WF Jr.

Air Med J. 2002 Jan-Feb;21(1):22-5.

PMID:
11805763
48.

The "Airmedical F.A.S.T." for trauma patients--the initial report of a novel application for sonography.

Polk JD, Fallon WF Jr, Kovach B, Mancuso C, Stephens M, Malangoni MA.

Aviat Space Environ Med. 2001 May;72(5):432-6.

PMID:
11346008
49.

Comparison of the laryngeal mask airway versus blind endotracheal intubation in the simulated entrapped patient: a preliminary study.

Polk JD, Super DM, Kovach B, Russell S, Mancuso C, Fallon W.

Air Med J. 2001 Mar-Apr;20(2):21-2. No abstract available.

PMID:
11250615
50.

A comparison of primate, carnivoran and rodent limb bone cross-sectional properties: are primates really unique?

Polk JD, Demes B, Jungers WL, Biknevicius AR, Heinrich RE, Runestad JA.

J Hum Evol. 2000 Sep;39(3):297-325.

PMID:
10964531

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