Anatomy Lab quiz 2 Flashcards
trapezius action
- Elevation and retraction of scapula
- Upward rotation of scapula
- Unilateral: lateral flexion of head
- Bilateral: extension of head
trapezius insertion
Insertion- lateral 1/3 of clavicle, acromion, spine of scapula
trapezius innervation
spinal accessory nerve (CN XI or 11), ventral rami C2-C4
Levator Scapulae origin
TPs of C1-C4
Trapezius- origin
Upper- EOP, nuchal line, nuchal ligament
Middle- sps of c7-t5
Lower- sps of t5- t12
Levator Scapulae action
- Elevation of scapula
- Extension and lateral flexion of neck
Levator Scapulae insertion
medial border of scapula (superior part)
Splenius cervicis origin
SPs of T3-T6
Levator Scapulae innervation
dorsal scapular nerve
Splenius cervicis action
- Unilateral ipsilateral rotation and lateral flexion of neck
- Bilateral extension of neck
Splenius cervicis insertion
TPs of C1-C3 (posterior tubercle)
Sternocleidomastoid origin
- Sternal head: manubrium of sternum
- Clavicular head: medial portion of clavicle
Splenius cervicis innervation
cervical spinal nerves (dorsal rami)
Sternocleidomastoid action
- Rotation of head to contralateral side
- Lateral flexion to ipsilateral side
- Bilateral action: neck flexion and head extension
Sternocleidomastoid insertion
mastoid process of temporal bone
Sternocleidomastoid innervation
- Motor: spinal accessory nerve (CN 11)
- Sensory: ventral rami of C2, C3
Splenius Capitus origin
SPs of C3-‐T4 and nuchal ligament
splenius Capitus insertion
mastoid process of temporal bone
Splenius capitus action
unilateral: ipsilateral rotation and lateral flexion of head and neck
bilateral: extension of head and neck
Splenius capitus innervation
cervical spinal nerves
dorsal rami
