Unit 2 - Upper Limb: Trapezius, Levator Scapulae, and Rhomboids (Ex. II)

Question 1

transverse trapezius

Answer 1

O: aponeurosis @ spinous processes of T1-T4
I: acromion of scapula
Inn: spinal accessory N (CN XI); C3-C4 of C plexus
A: medially rotates scapula

Question 2

ascending trapezius

Answer 2

O: spinous processes of T5-T12
I: spine of scapula
Inn: spinal accessory N (CN XI); C3-C4 of C plexus
A: downward rotation of scapula

Question 3

action of trapezius as a whole

Answer 3

steadies scapula on thorax

Question 4

levator scapulae

Answer 4

O: transverse processes of C1-C4
I: S angle of scapula
Inn: dorsal scapular N (C4-C5)
A: elevates scapula and upwardly rotates while moving I angle medially; ipsilaterally laterally flexes neck

Question 5

rhomboid minor

Answer 5

O: spinous processes of C7 and T1
I: veterbral border of scapula at root of spine
Inn: dorsal scapular N (C4-C5)
A: steadies scapula; upward rotation of scapula

Question 6

rhomboid major

Answer 6

O: spinous processes of T2-T5
I: vertebral border of scapula I to root of spine
Inn: dorsal scapular N (C4-C5)
A: steadies scapula; upward rotation of scapula

Question 7

descending trapezius

Answer 7

O: EOP; nuchal ligament
I: L 1/3 of clavicle
Inn: spinal accessory N (CN XI); C3-C4 of C plexus
A: upwardly rotates scapula; rotates glenoid cavity S; ipsilaterally laterally flexes head and contralaterally rotates