Superficial and Deep Back Flashcards
Describe: Extrinsic muscles of the back
Muscles responsible for movement of the shoulder and upper limbs
Describe: Intrinsic muscles of the back
Muscles responsible for posture and movement of the head and spine
What muscles compose the Superficial Extrinsic muscles of the back?
- Trapezius
- Latissimus dorsi
- Levator scapulae
- Rhomboid minor
- Rhomboid major
What muscles compose the Intermediate Extrinsic muscles of the back?
- Serratus posterior superior
- Serratus posterior inferior
What muscles compose the Superficial Intrinsic muscles of the back?
- Splenius cervicis
- Splenius capitis
What muscles compose the Intermediate Intrinsic muscles of the back?
- Iliocostalis
- Longissimus
- Spinalis
What muscles compose the Deep Intrinsic muscles of the back?
- Semispinalis
- Multifidus
- Rotatores
What is the innervation and blood supply for the: Trapezius?
Nerve: Cranial Nerve XI (Spinal Accessory)
Artery: Superficial branch of transverse cervical artery
What is the innervation and blood supply for the: Latissimus dorsi?
Nerve: Thoracodorsal nerve
Artery: Thoracodorsal artery
What is the innervation and blood supply for the: Rhomboid minor?
Nerve: Dorsal scapular nerve
Artery: Dorsal scapular artery
What is the innervation and blood supply for the: Rhomboid major?
Nerve: Dorsal scapular nerve
Artery: Dorsal scapular artery
What is the innervation and blood supply for the: Levator scapulae?
Nerve: Dorsal scapular nerve
Artery: Dorsal scapular artery
What is the function of the Trapezius?
Scapular movement, rotation of glenoid cavity
Where does Cranial Nerve XI arise from?
C1-C5 cervical spinal nerves
Where does Cranial Nerve XI enter/exit the skull?
- Enters skull through foramen magnum
- Exits skull through jugular foramen
How do you test the Trapezius clinically?
Ask patient to shrug shoulders against resistance (evaluate strength of one side compared to the other)
- Loss of symmetry
- Drooping shoulder
- Limited scapular movement
What is the function of the Latissimus dorsi?
Extension and Adduction of the upper arm
