subfalcial
/ˌsʌbˈfæʃɪəl/Definitions
1. adjective
relating to or situated below the fascia (a layer of connective tissue that surrounds muscles, bones, or other structures)
“The subfascial dissection of the muscle was necessary for the surgery.”
2. adverb
in or under the fascia
“The needle was inserted subfascially to minimize tissue damage.”