actions

Question 1

splenius capitis, splenius cervicis

Answer 1

unilateral - laterally flexes and rotates head or neck to same side
bilateral - extends head and neck

Question 2

spinalis, longissimus, iliocostalis

Answer 2

unilateral - laterally flexes VT to same side

bilateral - extends VT and head, stabilizes VT

Question 3

semispinalis capitis, semispinalis cervicis

Answer 3

unilateral - extends and laterally rotates head to opposite side
bilateral - extends head

Question 4

multifidus

Answer 4

extends and rotates VT to opposite side