Epaxial Muscles

Question 1

describe the transversospinalis system: splenius, semispinalis capitis (beventer cervicis, complexus)

Answer 1

tranvsersospinalis is super general in thoracic region, just know it’s the most dorsal group

in the neck: splenius is larger and most superficial, resect it to expose the 2-headed biventer cervices (dorsal) and the complexus (ventral)

biventer cervicis + complexus = semispinalis capitis

Question 2

describe the longissimus system: longissimus thoracic et lumborum, longissisimus cervicis, longissimus capitis, and longissisimus atlantis (equine and bovine)

Answer 2

longissimus thoracic et lumborum: no idea where it ends betwen lumbar and thoracic region, is the middle group of muscles

longissimus cervicis; larger and goes to the transverse process of the cervical vertebrae

longissimus capitis: smallest

longissimus atlantis (equine and bovine): runs ventral to longissimus cervicis

Question 3

describe the ileocostalis muscle

Answer 3

most ventral group of muscles

Question 4

describe general innervation to the epaxial muscles

Answer 4

all epaxial muscles are innervated by the dorsal branches of the spinal nerves