DT - SLO Kinesiology

Origins

100

Origin of Splenius Capitis?

Nuchal ligament, SPs C7–T3

200

Origin of Splenius Cervicis?

SPs T3–T6

300

Origin of Semispinalis Capitis?

TPs C4–T7, APs C4–C6

400

Origin of Semispinalis Cervicis?

TPs T1–T6

500

Which two of the four muscles originate on thoracic spinous processes?

Splenius Cervicis, Splenius Capitis

Insertions

100

Insertion of Splenius Capitis?

Mastoid process, lateral superior nuchal line)

200

Insertion of Splenius Cervicis?

TPs C1–C3

300

Insertion of Semispinalis Capitis?

Between superior & inferior nuchal lines of occiput

400

Insertion of Semispinalis Cervicis?

SPs C2–C5

500

Which muscle inserts on the mastoid process?

Splenius Capitis

Actions

100

Bilateral action of Splenius Capitis?

Extension of head/neck

200

Unilateral action of Splenius Cervicis?

Lateral flexion & rotation to same side

300

Bilateral action of Semispinalis Cervicis?

Extension of cervical spine

400

Unilateral action of Semispinalis Capitis?

Rotation to opposite side

500

Which muscles are ipsilateral rotators vs. contralateral rotators?

Splenius = ipsilateral; Semispinalis = contralateral

Clinical Connection

100

Tightness in Splenius Capitis could cause restriction in which motion?

Neck rotation to same side, extension

200

Which muscle helps stabilize cervical spine during posture?

Semispinalis Cervicis

300

A client with whiplash may have dysfunction in which two of these muscles?

Splenius Capitis & Splenius Cervicis

400

Which group balances contralateral & ipsilateral rotation in the cervical spine?

Splenius & Semispinalis as antagonists

500

A client reports pain near the mastoid process; which muscle insertion could be tender?

Splenius Capitis