The next question is whether the personal injury arose out of and in the course of employee's employment. The legislature enacted a two-part test for determining if an injury arises out of and in the course of employment. Section 287.020.3 provides that:
(2) An injury shall be deemed to arise out of and in the course of the employment only if:
(a) It is reasonably apparent, upon consideration of all the circumstances, that the accident is the prevailing factor in causing the injury; and
(b) It does not come from a hazard or risk unrelated to the employment to which workers would have been equally exposed outside of and unrelated to the employment in normal nonemployment life.
The parties stipulated that "the condition of [employee]'s workplace contributed to make the [employee]'s injuries more significant than they would have otherwise been. Specifically, the fall from the roof caused the shoulder and other traumatic injuries and the resulting medical expenses as set forth in paragraph 5."
Applying dictionary definitions to the above stipulation, it is clear the accident is the most important influence in causing the physical violence to employee's body. ${ }^{[2]}$ Employee has established the first prong of the arising out of and in the course of employment test.
I now consider the second prong of the test. One of the hazards posed by employee's job is working high above the ground. The violence to the physical structure of employee's body clearly did not come from a hazard or risk unrelated to employee's employment as a carpenter to which workers are equally exposed in their normal nonemployment life. The hazards of performing carpenter work at great heights are not normally encountered by workers in nonemployment life.
The employee's accident arose out of and in the course of employment as defined by § 287.020.3(2). So, absent statutory provisions to the contrary, the employer is liable to "to furnish compensation under the provisions of this chapter for personal injury or death of the employee by accident arising out of and in the course of the employee's employment, and shall be released from all other liability therefor whatsoever, whether to the employee or any other person." See § 287.120.1.
Idiopathic Cause Exclusion
§ 287.020.3(3) provides that, "[a]n injury resulting directly or indirectly from idiopathic causes is not compensable." Thus, the next question we must answer is, notwithstanding that employee's accident arose out of and in the course of employment, did employee's injuries result directly or indirectly from idiopathic causes such that they are not encompassed with the purview of the Missouri Workers' Compensation Act?
"Idiopathic," means alternately: "1: peculiar to the individual: INNATE. 2: arising spontaneously or from an obscure or unknown cause: PRIMARY < epilepsy>." WEBSTER'S THIRD NEW INTERNATIONAL DICTIONARY 1123 (3d ed. 1971). In Alexander v. D.L. Sitton Motor Lines, 851 S.W.2d 525 (Mo. banc 1993), the Missouri Supreme Court adopted the first definition of idiopathic. Because the Alexander court reached this conclusion in order to interpret the phrase "arising out of," the legislature has expressly abrogated the holding in Alexander. Because the second definition is specifically exemplified with a medical reference (coincidentally, to a seizure disorder), I believe the second definition is the most appropriate definition to be applied for purposes of $\S 287.020 .3(3)$.
"Cause," means, "something that produces an effect or result <the cause of the accident>." BLACK'S LAW DICTIONARY 234 (8 ${ }^{\text {th }}$ ed. 2004).
The parties stipulated that employee suffered his seizure as a result of head trauma he sustained in a motorcycle accident in 2004. Employee's seizure did not arise spontaneously or from an obscure or unknown cause. Employee's seizure was not an "idiopathic cause" as that term is defined for medical purposes. The exclusion of $\S 287.020 .3(3)$ does not apply in this case.