Swainson, J.

In 1956 plaintiff-appellant Edward B. DeGeer suffered a back injury during the course of his employment with the DeGeer Farm Equipment Company. Compensation was paid voluntarily for the first 500 weeks of disability. After the period of initial compensation expired, appellant filed an application for a hearing with the Workmen’s Compensation Department alleging permanent and total disability and seeking further compensation under Part II, § 10(b)(7) of the Workmen’s Compensation Act which grants extended benefits when injury results in the "[permanent and total loss of industrial use of both legs * * * .” (1956 PA 195; MCLA 412.10; MSA 17.160, reenacted by MCLA 418.361[2] [g]; MSA 17.237[361] [2] [g].) 1

A hearing was held before a Workmen's Compensation Department hearing referee. The hearing referee granted appellant’s application for permanent and total disability benefits, stating in part:

*99 "The plaintiff is totally and permanently disabled as a matter of fact. The question is whether or not he can meet the statutory definition of permanent and total by establishing the loss of use of his legs.

♦ * *

"There is no condition in plaintiff’s legs which would disable him. His disabling condition is in his back where he has had four operations. Because of his back he cannot tolerate prolonged sitting, standing, or walking. He cannot use his legs long enough or consistently enough to qualify for type of employment which could reasonably be anticipated. I believe these facts require a finding of loss of use of both legs under the authority of Paulson v Tile Company, 371 Mich 312 [123 NW2d 715 (1963)].”

The decision of the referee was thereafter reversed on review by the Workmen’s Compensation Appeal Board. The Appeal Board found appellant ineligible for any total and permanent disability benefits. It concluded:

"The legal rules which must guide our determination as to whether plaintiff has suffered the industrial loss of use of both limbs are detailed in the Supreme Court’s holdings in Paulson, supra; Miller v Sullivan Milk Products, Inc, 385 Mich 659 [189 NW2d 304 (1971)]; Whitt v Ford Motor Co, 383 Mich 726 [178 NW2d 917 (1970)]; and the Court of Appeal’s holdings in Lockwood v Continental Motors Corp, 27 Mich App 597 [183 NW2d 807 (1970)], and Kozlowski v Chrysler Corp, 25 Mich App 392 [181 NW2d 785 (1970)].

"[Pjlaintiff’s medical proofs will not in our opinion support his claim that he has suffered the industrial loss of use of both legs. Both physicians are in agreement that plaintiff’s employment opportunities are limited because of the injury and subsequent surgery to his back, however, both plaintiff’s medical witness and the defendant’s medical witness agree that plaintiff is able to perform work which would of necessity require the *100 use of the lower limbs. Neither doctor would testify that plaintiff has in fact suffered the industrial loss of use of his lower extremities. In our opinion the proofs presented will not support a finding that plaintiff has in fact suffered the industrial loss of use of both limbs as a result of the injury he suffered in February, 1956.”

The Court of Appeals (Levin, J. dissenting) denied leave to appeal. This Court subsequently granted leave to appeal, 389 Mich 803 (1973) and ordered that this case be argued on the same day as Burke v Ontonagon County Road Commission, 389 Mich 804 (1973).

Appellant raises one basic question for our consideration.

"Where an employee suffers a back injury which upon use of his legs produces such disabling back pain that no form of employment could reasonably be anticipated, does such employee suffer the industrial loss of use of his legs?”

Our first step in reviewing a decision of the Workmen’s Compensation Appeal Board is to separate its findings of fact from its understanding of the law controlling the case. If the Appeal Board correctly understood the law and determined as a matter of fact that appellant did not suffer permanent and total disability, we are bound by law to accept its decision in this case. Const 1963, art 6, § 28; MCLA 418.861; MSA 17.237(861). If, however, the Appeal Board erroneously interpretated the Workmen’s Compensation Act in reaching its decision, we have the duty and authority to correct any such erroneous legal conclusions. Id.

In the present case we are unable to perform that necessary first step of review. Unfortunately, *101 the opinion of the Appeal Board has combined its findings of fact and legal conclusions in such a manner that the opinion may be fairly read to support either appellant’s position that the Appeal Board denied benefits because it interpreted the law to limit recovery to factual situations in which the disability results from a direct injury to the legs, or appellees’ position that no permanent and total loss of industrial use was factually established. Consequently, we must remand this case for further proceedings consonant with the remainder of today’s opinion.

In order to allow the appellate courts to properly perform the review function we remind the appeal board that:

"We cannot * * * review the findings of the board as a question of law if * * * it has done nothing more than to present us with a conclusory finding in the form of the statutory language. We need to know the path the board has taken through the conflicting evidence. The appeal board should indicate the testimony adopted, the standard followed and the reasoning it used in reaching its conclusion.” McClary v Wagoner, 16 Mich App 326, 327-328; 167 NW2d 800 (1969).

In Burke v Ontonagon County Road Commission, 391 Mich 103; 214 NW2d 797 (1974), Justice Williams has thoroughly reviewed the scope of disability required to bring a claimant within the statutory phrase, "permanent and total loss of industrial use of both legs * * * .” In Burke, this Court adopted the following test:

"There is permanent and total loss of industrial use of both legs where, inter alia,

1. An employment-related injury in one or both legs *102 causes pain or other condition that prevents use of both legs in industry.

2. The use of one or both legs, whether or not injured, triggers an employment-related injury or malady in any part of the body, including one or both legs, that causes pain or other condition that prevents use of both legs in industry.” 391 Mich 103, 114; 214 NW2d 797 (1974).

If appellant DeGeer, on remand, establishes that the use of his legs produces such disabling back pain that he is no longer able to use his legs to perform any reasonable employment, then he will clearly be eligible for permanent and total disability benefits under the above discussed section of the Workmen’s Compensation Act.

Reversed and remandéd to the Workmen’s Compensation Appeal Board for further proceedings, including the taking of additional testimony if requested, by the Appeal Board or any party, to comply with this opinion. Costs to plaintiff-appellant.

T. M. Kavanagh, C. J., and T. G. Kavanagh, Williams, M. S. Coleman, and J. W. Fitzgerald, JJ., concurred with Swainson, J. Levin, J., did not sit in this case.

We note with approval the Workmen’s Compensation Appeal. Board’s application of the holding in Rasar v Chrysler Corp, 382 Mich 169; 169 NW2d 303 (1969), in this case. In the words of the Appeal Board:

"Plaintiff was injured prior to the 1956 amendment and if he is permanently and totally disabled as such tenri was defined in the 1956 amendment by the addition of Sec. 10 (b)(7), Part II, then the liability for both the differential payments accruing thereafter and all payments in .excess of 500 weeks would be the liability of the Second Injury Fund.”