後頭前頭筋

Blend of 後頭筋 (“occipitalis muscle”) +‎ 前頭筋 (“frontalis muscle”), calque of New Latin mūsculus occipitofrontālis

後(こう)頭(とう)前(ぜん)頭(とう)筋(きん) • (kōtō zentōkin) 

1. an occipitofrontalis muscle

   Synonym: 頭蓋表筋 (tōgaihyōkin)

   • 2013 April 20, “頭・顔・頚 [The Head, Face, and Neck]”, in Michiyo Miyanaga, transl., アーティストのための美術解剖学 [Anatomy for Artists] (non-fictiona; paperback), Tokyo: Maar-sha, translation of Classic Human Anatomy by Valerie L. Winslow, →ISBN, page 82, column 1:

     前(ぜん)頭(とう)筋(きん)　Frontalis
     前(ぜん)頭(とう)筋(きん)（前(ぜん)額(がく)の筋(きん)）は前(ぜん)額(がく)（前(ぜん)頭(とう)骨(こつ)）に位(い)置(ち)し、おおよそ髪(かみ)の生(は)えぎわから下(お)りて眉(まゆ)の隆(りゅう)起(き)に伸(の)びている。その右(う)縁(えん)と左(さ)縁(えん)は側(そく)頭(とう)線(せん)に近(ちか)く、筋(きん)は前(ぜん)額(がく)の中(ちゅう)央(おう)で分(わ)かれている。
     前(ぜん)頭(とう)筋(きん)は、後(こう)頭(とう)前(ぜん)頭(とう)筋(きん)（occipito‐frontalis）の前(ぜん)部(ぶ)（front portion／前(ぜん)腹(ふく)〈frontal belly〉）である。後(こう)頭(とう)部(ぶ)（occipital portion）とよばれる後(こう)部(ぶ)の筋(きん)腹(ふく)（posterior belly）は頭(とう)蓋(がい)の裏(うら)側(がわ)にあり、髪(かみ)がある状(じょう)態(たい)では認(みと)めにくい。

     Zentōkin Frontalis
     Zentōkin (zengaku no kin) wa zengaku (zentōkotsu) ni ichi shi, ōyoso kami no haegiwa kara orite mayu no ryūki ni nobiteiru. Sono uen to saen wa sokutōsen ni chikaku, kin wa zengaku no chūō de wakareteiru.
     Zentōkin wa, kōtō zentōkin (occipito‐frontalis) no zenbu (front portion／zenfuku〈frontal belly〉) de aru. Kōtōbu (occipital portion) to yobareru kōbu no kinfuku (posterior belly) wa tōgai no uragawa ni ari, kami ga aru jōtai de wa mitomenikui.

     Frontalis
     The frontalis muscle (the muscle of the forehead) is positioned on the forehead (frontal bone), extending approximately from the hairline down toward the brow ridge. Its right and left borders are near the temporal lines, and the muscle is divided in the center of the forehead.
     The frontalis is the front portion (or frontal belly) of the occipito-frontalis muscle. The posterior belly, called the occipital portion, is on the back of the skull, and is hard to detect if there is hair on top of it.