ɪt ɡˈɪvz ˈɔːɹɪdʒˌɪn tə mˈʌskjʊlɚ fˈaɪbɚz, ɪspˈɛʃəli æt ðɪ ˌʌpɚ pˈɑːɹt ʌvðə mˈiːdiːəl ænd lˈæɾɚɹəl sˈaɪdz ʌvðə fˈɔːɹɑːɹm, ænd fˈɔːɹmz ðə bˈaʊndɚɹiz əvə sˈɪɹiz ʌv kˈoʊnʃˈeɪpt kˈævᵻɾiz, ɪnwˌɪtʃ ðə mˈʌsəlz ɑːɹ kəntˈeɪnd.
It gives origin to muscular fibers, especially at the upper part of the medial and lateral sides of the forearm, and forms the boundaries of a series of cone-shaped cavities, in which the muscles are contained.