title: Effect of the Mandibular Orthopedic Repositioning Appliance (MORA) on Forearm Muscle Activation and Grasping Power during Pinch and Hook Grip.
abstract: [Purpose] This study verified the changes in muscle activities and grasping power during maximal isometric exercise of the forearm and masseter muscle with and without a mandibular orthopedic repositioning appliance (MORA). It also offers basic data for defining the correlation of function of hand with mouth. [Methods] EMG was used to measure masticatory muscle, flexor bundle and extensor bundle activities with or without MORA while subjects performed the hook grip and pinch grip. The measuring tool used for measuring grip strength was the same as that used for measuring pinch and hook strength. The subjects were 28 healthy young adults. [Result] Muscle activity and grasping power significantly increased when wearing the MORA. [Conclusion] The result indicates that wearing MORA can increase muscle activity and grasping power of forearm and masseter muscle. We think wearing MORA might help improve the function of the forearm because it activates the function of the masseter.
authors.affiliation: Department of Physical Therapy, College of Science, Kyungsung University, Republic of Korea.
authors.forename: Sang-Yeol
authors.initials: SY
authors.lastname: Lee
authors.affiliation: Major of Physical Therapy, Kyungsung University, Republic of Korea.
authors.forename: Yi-Jeong
authors.initials: YJ
authors.lastname: Park
authors.affiliation: Major of Physical Therapy, Kyungsung University, Republic of Korea.
authors.forename: Hye-Min
authors.initials: HM
authors.lastname: Park
authors.affiliation: Major of Physical Therapy, Kyungsung University, Republic of Korea.
authors.forename: Hae-Jin
authors.initials: HJ
authors.lastname: Bae
authors.affiliation: Major of Physical Therapy, Kyungsung University, Republic of Korea.
authors.forename: Min-Ji
authors.initials: MJ
authors.lastname: Yu
authors.affiliation: Major of Physical Therapy, Kyungsung University, Republic of Korea.
authors.forename: Hee-Won
authors.initials: HW
authors.lastname: Choi
authors.affiliation: Major of Physical Therapy, Kyungsung University, Republic of Korea.
authors.forename: Na-Young
authors.initials: NY
authors.lastname: Hwang
keywords: Grip power; MORA; Muscle activation