Appellant Jack Est-ridge appealed the denial of benefits by the Workers’ Compensation Commission regarding an injury to his back that he alleged occurred while in the employ of appellee Waste Management. The administrative law judge had determined that appellant sustained a compensable aggravation to his preexisting degenerative *278condition for which he was entitled to benefits. After a reversal of that decision by the Commission, appellant appealed to the Arkansas Court of Appeals. The Court of Appeals affirmed the Commission’s denial of benefits in an unpublished decision, CA 99-1208.
Appellant then petitioned this Court for review. Appellant contends that the decision by the Court of Appeals is in conflict with prior case law, and is therefore in error. We granted appellant’s petition for review pursuant to Ark. Sup. Ct. R. l-2(e). The issue on appeal is whether appellant proved that he sustained a compensable injury. We hold that he did and, therefore, reverse the Full Commission’s decision to deny benefits, as well as the Court of Appeals decision to affirm the Commission.
Standard of Review
Upon a petition for review, we consider a case as though it had been originally filed in this Court. Maxey v. Tyson Foods, Inc., 341 Ark. 306, 18 S.W.3d 328 (2000); Woodall v. Hunnicutt Construction, 340 Ark. 377, 12 S.W.3d 630 (2000);White v. Georgia-Pacific Corporation, 339 Ark. 474, 6 S.W.3d 98 (1999); Burlington Indus. v. Pickett, 336 Ark. 515, 988 S.W.2d 3 (1999). We view the evidence in a fight most favorable to the Commission’s decision, and we uphold that decision if it is supported by substantial evidence. Id.; Deffenbaugh Indus. v. Angus, 313 Ark. 100, 852 S.W.2d 804 (1993). We will not reverse the Commission’s decision unless we are convinced that fair-minded persons with the same facts before them could not have reached the conclusions arrived at by the Commission. Pickett, 336 Ark. 515, 988 S.W.2d 3; ERC Contr. Yard & Sales v. Robertson, 335 Ark. 63, 977 S.W.2d 212 (1998).
Facts and Procedural History
The evidence presented by the parties revealed the following events. Appellant, who at the time was in his mid-forties, reported a back injury after carrying and nearly dropping a railroad crosstie while on the job on September 28, 1994. He reported the incident to appellee Waste Management and was referred to Dr. Owens, who diagnosed appellant with a low back strain and radicular pain. This course of events is not in dispute.
*279Dr. Owens documented no objective medical findings to support this diagnosis, but he prescribed Valium “as needed for muscle spasms.” Radiographic studies revealed mild to moderate degenerative and hypertrophic changes. While no mention was made by the radiologist, Dr. Owens noted that the x-ray showed a straightening of the lordotic curve. Appellant was returned to work light duty, but an MRI was subsequently ordered when his pain failed to subside. The MRI report stated that appellant appeared to have herniated discs at L4-5 and L5-S1.
A referral to neurosurgeon Dr. Mason followed, whose diagnostic tests revealed the same suspected herniations. Dr. Mason operated on appellant and, upon viewing appellant’s spine, discovered that appellant suffered from spondylosis and facet hypertrophy but did not have herniated discs. After surgery, Dr. Mason assigned appellant an 11 percent permanent anatomical impairment rating to the body as a whole, attributing the rating to surgical changes and degenerative disc problems. This rating was derived from the American Medical Association’s Guides to the Evaluation of Permanent Impairment, Fourth Edition.
Dr. Mason was asked during a deposition whether appellant’s condition was caused by his work, to which he stated that he could not so opine within a reasonable degree of medical certainty; he could only go by the patient’s history that he developed pain after the lifting injury. When asked if the work incident worsened his back condition, if it was preexisting, Dr. Mason replied that there was no way to know without comparative diagnostic studies prior to the crosstie-carrying event. Fie also stated that the development of spondylosis and face hypertrophy was usually a slow process causing degenerative changes. Fie said, “It’s impossible to develop these changes in a short period of time.” Dr. Mason further stated, though, that the lifting incident caused more than 50 percent of appellant’s problem that necessitated treatment.
The insurance carrier directed appellant to Dr. Saer at the Spine Clinic who opined that his symptoms were most likely related to his persistent degenerative disc disease. Dr. Saer recommended that appellant undergo a lumbar fusion to address the degenerative condition.
*280Appellant testified that he had worked as a manual laborer since he was about sixteen years old, including working on oil rigs and skidding logs. As a Vietnam veteran, he had undergone treatment for post-traumatic-stress disorder (“PTSD”) and mood swings, and he testified that his back condition made him more susceptible to depression since he could not work. At the time of the hearing, appellant was still being medicated for conditions other than his back, all administered by the VA. Hospital, and had been qualified for total disability due to his PTSD. Appellant admitted in his testimony that he had been treated for muscle spasms after pulling muscles in his back before he began working for Waste Management. Also, he presented to the Medical Center of South Arkansas on July 31, 1993, more than a year prior to the work incident, and reported that he had “chronic back problems.” The Commission denied appellant benefits, finding that there was lacking any objective findings to support an injury while at work.
Merits of the Case
It is clear that muscle spasms can constitute objective medical findings to support compensability. See Continental Express, Inc. v. Freeman, 66 Ark. App. 102, 989 S.W.2d 538 (1999); University of Arkansas for Medical Sciences v. Hart, 60 Ark. App. 13, 958 S.W.2d 546 (1997). Muscle spasms detected by someone other than a physician, such as a physical therapist, can be sufficient as well, since this is a perception by someone other than the claimant. See Continental Express, supra. The Commission concluded, however, that there was no observation of muscle spasm in appellant because the prescription for Valium “as needed for muscle spasm” was a direction to appellant and not a finding of the presence of muscle spasm. Further, the Commission deemed the treating physician’s finding of a straightening of the lordotic curve unreliable because the radiologist did not note that finding in his report.
It is well settled that the Commission has the authority to accept or reject medical opinion and the authority to determine its medical soundness and probative force. Hope Livestock Auction Company v. Knighton, 67 Ark. App. 165, 992 S.W.2d 826 (1999); Sapp v. Phelps Trucking, Inc., 64 Ark. App. 221, 984 S.W.2d 817 (1998). However, it is also well settled that once an injury is identified by specific incident and time, it is not necessary that the *281claimant prove that the work, rather than the injury, was a major cause of the disability and need for treatment. See Williford v. City of North Little Rock, 62 Ark. App. 198, 969 S.W.2d 687 (1998); Second Injury Fund v. Stevens, 62 Ark. App. 255, 970 S.W.2d 331 (1998); Medlin v. Wal-Mart Stores, 64 Ark. App. 17, 977 S.W.2d 239 (1998); Farmland v. Dubois, 54 Ark. App. 141, 923 S.W.2d 883 (1996). Further, where there is little or no medical evidence to the contrary, it is error to deny compensability where reasonable minds cannot differ. See Crudup v. Regal Ware, Inc., 69 Ark. App. 206, 11 S.W.3d 567 (2000); Lloyd v. UPS, 69 Ark. App. 92, 929 S.W.2d 564 (2000).
Appellant contends that the Commission erred in making a medical finding that because a radiologist did not mention straightening of the lordotic curve, no straightening was present. We agree. Appellant’s treating physician found straightening of the curve in the spine, which is a sign that is normally associated with muscle spasm in the straightened area. This finding is objective evidence of injury with no evidence to the contrary. Appellee Waste Management asserts that the issue is one of causal connection between the lifting at work and the findings at surgery and that no causal connection was established. We disagree.
It was undisputed that appellant sustained an accidental injury at work and was diagnosed initially with back strain and received medication. What is disputed is whether appellant presented proof of objective medical evidence and whether there was a causal connection between the injury and the medical treatment. We hold that appellant did present proof of objective medical evidence and that there was a causal connection between the injury and the medical treatment, for the following reasons.
First, he was indisputably diagnosed with back strain for which he received medication after the crosstie incident. The medication was directed “as needed for muscle spasm” which the Commission dismissed as a direction to appellant rather than a medical finding. We find the Commission’s dismissal of this fact to be absurd. A doctor would not prescribe medication directed to be taken “as needed for muscle spasm” if he did not believe muscle spasms were existent. Notwithstanding, when the medication did not relieve his pain, an MRI was performed that showed possible herniated discs at L4-5 and L5-S1. He was then referred to a neurosurgeon whose *282tests also led him to believe that there were herniated discs present. It was only during surgery that the diagnosis of herniations was ehminated. Following surgery, the neurosurgeon attributed 50 percent of appellant’s need for treatment to the crosstie accident.
Second, under Ark. Code Ann. § 11-9-102 (Supp. 1999), two types of injuries are recognized: accidental and gradual onset. An accidental injury is defined as caused by a specific incident and is identifiable by time and place of occurrence. Ark. Code Ann. § 11-9-102(4)(A)(i). For an accidental injury, it is not necessary that the claimant prove that the injury is the major cause of the disability or need for treatment. While it is undisputed that appellant has degenerative disease, the accidental injury at work either caused or precipitated the need for medication and surgery that is clear. The finding of a straightened lumbar-spine is an objective medical finding and, as noted above, this is a sign that is normally associated with muscle spasm in the straightened area. Further, the diagnosis, albeit wrong, that he had herniated discs caused surgery to be performed. Therefore, a causal connection did exist between the lifting at work and the findings at surgery.
The burden on appellant to prove a compensable injury was by a preponderance of the evidence. Ark. Code Ann. § 11-9-102(4)(E)(i). Based upon this burden of proof, as well as our standard of review of the Commission’s decision, we are convinced that fair-minded persons presented with these same facts could not have reached the same conclusion as the Commission. For these reasons, we hereby reverse the Full Commission’s decision to deny benefits to Mr. Estridge. Likewise, the Court of Appeals decision, affirming the Full Commission, is hereby reversed.
Reversed.
Brown, Imber, and Smith, JJ., dissent.