Compass Group USA (“employer”) and CNA Risk Management Co. (“carrier”) (collectively “defendants”) appeal from an opinion and award entered by the North Carolina Industrial Commission (“Full Commission”) awarding Beverly Ruffin (“plaintiff”) workers’ compensation benefits. We affirm.
Pertinent facts and procedural history include the following: Plaintiff worked as a vendor, servicing vending machines in Rocky Mount, North Carolina. Her duties consisted of loading and unloading food supplies and soft drinks from her truck and stocking vending machines. Additionally, plaintiff was responsible for re-supplying cola machines with syrup. When a handcart was inaccessible, plaintiff was also responsible for manually carrying eight to ten cases of soda and lifting forty-pound boxes of syrup. Plaintiff operated the same vending route for a year; however, in April 1998, her route changed. Although plaintiff’s normal job duties were not altered by her new route, there was a significant change in the amount of her work load including longer hours and more lifting and straining than her job normally required.
On 9 May 1998, plaintiff pulled a forty-pound box of syrup from the truck. As she lifted the box, plaintiff felt a cramp in her left shoulder blade. The next morning, plaintiff experienced pain in her left shoulder and numbness in her left arm and fingers. Plaintiff reported to the emergency room with complaints of “pain in her left side of her *482upper back” and was referred to Carolina Regional Orthopaedics. On 21 May 1999, plaintiff was examined by Dr. David C. Miller (“Dr. Miller”), a spine specialist. Dr. Miller reviewed plaintiffs MRI which revealed pre-existing problems including an unusual curvature of the spine and disc herniations and concluded that the 9 May 1999 injury aggravated these pre-existing conditions. Dr. Miller further stated that the aggravation of plaintiffs herniated disc resulted in nerve impingement which caused plaintiffs neck and left shoulder pain. After surgery, plaintiff returned to work with restrictions against repeated lifting of more than forty pounds.
Plaintiff filed a claim for workers’ compensation benefits. On 22 January 1999, a hearing was held before Deputy Commissioner Amy L. Pfeiffer. In an opinion filed 17 November 1999, Deputy Commissioner Pfeiffer denied plaintiffs claim, concluding that plaintiff did not sustain an injury by accident arising out of and in the course of her employment. Plaintiff appealed to the Full Commission and with one member dissenting, the Full Commission reversed the opinion and award of the Deputy Commissioner and made the following pertinent finding of fact:
12. On 9 May 1998, plaintiff suffered an injury resulting from a specific traumatic incident which arose out of and in the course of her employment with defendant-employer, and which aggravated a pre-existing condition of her cervical spine.
The Commission concluded that plaintiff suffered a “compensable injury in the form of the aggravation of a pre-existing condition as a direct result of a specific traumatic incident arising out of and in the course of her employment” with defendants. From this opinion and resulting award, defendants appeal.
[1] In the first assignment of error, defendants contend that the Full Commission erred when it found as a fact and concluded as a matter of law that plaintiff suffered a compensable back injury resulting from a “specific traumatic injury” arising out of and during the course of employment. For the reasons discussed below, we disagree.
First we note that in reviewing an opinion and award entered by the Full Commission, our inquiry is limited to two questions: (1) whether there is any competent evidence in the record to support the Commission’s findings of fact, and (2) whether the Commission’s findings of fact, likewise, support its conclusions of law. See Simmons v. N.C. Dept. of Transp., 128 N.C. App. 402, 405-06, 496 *483S.E.2d 790, 793 (1998). “The findings of fact by the Industrial Commission are conclusive on appeal, if there is any competent evidence to support them, and even if there is evidence that would support contrary findings.” Fish v. Steelcase, Inc., 116 N.C. App. 703, 708, 449 S.E.2d 233, 237 (1994), cert. denied, 339 N.C. 737, 454 S.E.2d 650 (1995). However, the Commission’s conclusions of law are fully reviewable on appeal. Id. This Court “does not have the right to weigh the evidence and decide the issue on the basis of its weight. The court’s duty goes no further than to determine whether the record contains any evidence tending to support the finding.” Anderson v. Construction Co., 265 N.C. 431, 434, 144 S.E.2d 272, 274 (1965). See also Deese v. Champion Int’l Corp., 352 N.C. 109, 116-17, 530 S.E.2d 549, 553 (2000) (holding that “[requiring the Commission to explain its credibility determinations and allowing the Court of Appeals to review the Commission’s explanation of those credibility determinations would be inconsistent with our legal system’s tradition of not requiring the fact finder to explain why he or she believes one witness” or one piece of evidence over another).
N.C. Gen. Stat. § 97-2(6) (2001) defines a back injury as one arising “out of and in the course of the employment, and is the direct result of a specific traumatic incident of the work assigned.” Prior to the amendment in 1983, “this statute required that there be some type of unusual circumstance” for a compensable back injury. Fish, 116 N.C. App. at 707, 449 S.E.2d at 237. N.C. Gen. Stat. § 97-2(6) now provides two theories upon which a back injury can be compensated: “(1) if the claimant was injured by accident; or (2) if the injury arose from a specific traumatic incident.” Glynn v. Pepcom Industries, 122 N.C. App. 348, 354, 469 S.E.2d 588, 591 (1996). “If the injury arises out of and in the course of employment and is the result of a ‘specific traumatic incident,’ then the statute as amended mandates that the injury be construed to be ‘injury by accident.’ ” Caskie v. R.M. Butler & Co., 85 N.C. App. 266, 268, 354 S.E.2d 242, 244 (1987) (citation omitted). However, if there is no ‘specific traumatic incident’ the claimant may still be entitled to workers’ compensation benefits if she meets the definition of ‘injury by accident.’ Id. (citation omitted).
Under our current case law, the specific traumatic incident provision of N.C. Gen. Stat. § 97-2(6) requires the plaintiff to prove an injury at a judicially cognizable point in time. See Fish, 116 N.C. App. at 708, 449 S.E.2d at 237. In determining whether an injury occurred at a cognizable time, it is not necessary to “allege the specific hour or day of the injury.” Id. Moreover, “[jJudicially cognizable does not *484mean ‘ascertainable on an exact date.’ ” Id. at 709, 449 S.E.2d at 238 (alteration in original) (citation omitted). Instead,
the term should be read to describe a showing by plaintiff which enables the Industrial Commission to determine when, within a reasonable period, the specific injury occurred. The evidence must show that there was some event that caused the injury, not a gradual deterioration. If the window during which the injury occurred can be narrowed to a judicially cognizable period, then the statute is satisfied.
Id. Thus, “events which occur contemporaneously, during a cognizable time period, and which cause a back injury, do fit the definition intended by the legislature.” Richards v. Town of Valdese, 92 N.C. App. 222, 225, 374 S.E.2d 116, 119 (1988), disc. review denied, 324 N.C. 337, 378 S.E.2d 799 (1989).
In the instant case, the evidence establishes that plaintiff sustained an injury as a result of a specific traumatic incident. The Commission found, and the evidence fully supports that plaintiff suffered a specific traumatic incident on 9 May 1998, when she lifted a forty-pound box of syrup out of her truck. This incident resulted in injury to her pre-existing back conditions including herniating discs and an unusual curvature of the spine. “Clearly, aggravation of a preexisting condition which results in loss of wage earning capacity is compensable under the workers’ compensation laws in our state.” Smith v. Champion, Int’l., 134 N.C. App. 180, 182, 517 S.E.2d 164, 166 (2000). We therefore hold that the competent evidence clearly supports the finding and resulting conclusion that “plaintiff suffered a compensable injury in the form of the aggravation of a pre-existing condition as a direct result of a specific traumatic incident arising out of and in the course of her employment].]”1
*485 [3] Defendants argue that the evidence only establishes that plaintiff suffered a shoulder injury, not a back injury. However, contrary to defendants’ assertion, there is competent evidence in the record to support the Full Commission’s findings that plaintiff suffered a compensable injury in the form of an aggravated back injury. Plaintiff testified that on 9 May 1998, she sustained an injury while lifting a forty-pound box of syrup out of her truck. Plaintiff stated that she felt a “pull or cramp” in the area of her left shoulder blade, towards the center of her back. Subsequent tests revealed herniating discs to the left side of plaintiff’s back. Medical evidence tended to show that plaintiff suffered from a “disk protrusion or a herniation at the C5 and C6 level” and “kyphosis which is an unusual curvature of the spine.” Dr. Miller opined that although plaintiff’s herniating discs probably pre-existed the 9 May 1998 injury, the incident aggravated plaintiff’s pre-existing condition and resulted in nerve impingement, causing neck and left shoulder pain. Even though the symptoms may have been manifest in the neck and shoulder area, the injury was to the spinal discs, which are indisputably, the “back.” Further, while there may have existed conflicting evidence as to the “degree of plaintiff’s impairment, it was for the Commission to weigh the credibility of the witnesses and to decide the issues.” Smith, 130 N.C. App. at 182, 517 S.E.2d at 166. We therefore overrule this assignment of error.
[4] In their second assignment of error, defendants further contend that the Full Commission erred by finding a causal connection between plaintiff’s injury and her disability. We disagree.
“In order for there to be a compensable claim for workers’ compensation, there must be proof of a causal relationship between the injury and the employment.” Peagler v. Tyson Foods, Inc., 138 N.C. App. 593, 597, 532 S.E.2d 207, 210 (2000). “In evaluating the causation issue, ‘this Court can do no more than examine the record to determine whether any competent evidence exists to support the Commission’s findings as to causation[.]’ ” Id. at 598, 532 S.E.2d at 210 (quoting Young v. Hickory Business Furniture, 137 N.C. App. 51, 55, 527 S.E.2d 344, 348 (2000)). An opinion by an expert to a reasonable degree of medical certainty that a particular cause could or might have produced the result is sufficient to support an award of workers’ compensation benefits. See Buck v. Proctor & Gamble, Co., 52 N.C. App. 88, 96, 278 S.E.2d 268, 273 (1981) (holding that in “viewing the totality of the expert testimony in the light most favorable to *486plaintiff,” there was some evidence that the incident could have “produced the particular disability in question,” and therefore, with respect to the sufficiency of the medical expert’s opinion on causation, it is conclusive on appeal).
In the instant case, medical testimony was presented to establish causation. Dr. Miller opined that plaintiffs work-related accident aggravated pre-existing conditions existing prior to the date of the injury. Dr. Miller testified, to a reasonable degree of medical certainty, that the lifting of the four-gallon box by plaintiff could have aggravated a pre-existing condition and that, “in light of those underlying findings, it is possible or likely that [plaintiffs] lifting episode could have exacerbated those underlying, preexisting conditions, to give[] her the pain that she complained about.” Dr. Miller further testified that the aggravation of plaintiff’s herniated discs resulted in nerve impingement causing plaintiff’s neck and left shoulder pain. In light of this testimony, we hold that the Full Commission did not err in determining that plaintiff’s pre-existing condition contributed to some reasonable degree to her current disability.
For the foregoing reasons, we hold that there was competent evidence to support the Full Commission’s findings and we affirm the opinion and award of the Full Commission.
Affirmed.
Judge HUDSON concurs.
Judge TYSON dissents.