TY  - JOUR
PY  - 2018//
TI  - A history of concussion does not lead to an increase in ocular near point of convergence
JO  - International journal of sports medicine
A1  - van Donkelaar, Paul
A1  - Dierijck, Jill
A1  - Wright, Alexander
A1  - Smirl, Jonathan
SP  - 682
EP  - 687
VL  - 39
IS  - 9
N2  - Ocular near point of convergence (NPC) has been shown to be sensitive to the effects of concussion and subconcussive impacts. To determine if NPC is also sensitive to a previous history of concussion, male contact-sport athletes either with (n=26) or without (n=16) a history of at least one previous concussion had their NPC assessed. The results showed that participants with a history of concussion displayed NPC values (9.4±1.6 cm) indistinguishable from those with no history of concussion (8.4±2.1 cm, t-test, p=0.09). This was the case regardless of whether 1, 2, or 3 or more concussions had occurred and despite the fact participants with concussion (mean time since last concussion: 1136 days) suffered from an increased number and severity of symptoms as assessed with the SCAT 3 (3.6±2.2 vs. 2.13±1.89 symptoms, 6.1±4.1 vs. 3.19±2.99 severity, t-test, p<0.05). Taken together, these results imply that NPC may not be a suitable tool to assess the potential long-term effects of one or more concussions over a longer time frame.: Future research using larger sample sizes is warranted to evaluate the potential dose-response relationship between number of prior concussions and NPC.<br><br>© Georg Thieme Verlag KG Stuttgart · New York.<p />  <p>Language: en</p>
LA  - en
SN  - 0172-4622
UR  - http://dx.doi.org/10.1055/s-0044-101454
ID  - ref1
ER  -