ɪɾ ɪz mˈʌtʃ θˈɪkɚɹ ɔnðə dˈoːɹsəl ðɐn ɔnðə vˈoʊlɚ sˈɜːfɪs, ænd æt ðə lˈoʊɚ ðɐn æt ðɪ ˌʌpɚ pˈɑːɹt ʌvðə fˈɔːɹɑːɹm, ænd ɪz stɹˈɛŋθənd əbˌʌv baɪ tˈɛndɪnəs fˈaɪbɚz dᵻɹˈaɪvd fɹʌmðə bˈaɪsɛps bɹˈækɪˌaɪ ɪn fɹˈʌnt, ænd fɹʌmðə tɹˈaɪsɛps bɹˈækɪˌaɪ bᵻhˈaɪnd.
It is much thicker on the dorsal than on the volar surface, and at the lower than at the upper part of the forearm, and is strengthened above by tendinous fibers derived from the Biceps brachii in front, and from the Triceps brachii behind.