Anatomy Lecture 4_back Musculature Flashcards
Define Extrinsic muscles
Muscles with attachment to the spine that move the upper extremities
Where does the trapezius attach (proximal and distal)
Proximal attachment is to medial 1/3 of superior nuchal line, EOP nuchal ligament and spinous processes of C7 to T12.
Distal attachment is to the lateral 1/3 of clavicle, acromion and scapular spine
What nerves provide inervation to the trapezius
- Spinal accessory nerve CN XI provides motor control
- C3 and C4 provide pain and proprioception
What is the trapz blood supply
the transverse cervical artery
Where does the Latissimus dorsi attach (proximal and distal)
Proximal attachment at spinous process of T7-T12, thoracolumbar fascia, inferior angle of the scapila, and ribs 9-12
Distal attachment at floor of intertubercular groves (humerus)
What nerve provides inervation to the lat?
The thoracodorsal nerve (C6-C8)
What is the lat’s blood supply
the thoracodorsal artery
Where does the levator scapulae attach (proximal and distal)
Proximal attachment at the transverse process of C1-C4
Distal attachment at superior angle of scapula
What is the levator scapulae’s blood supply
Dorsal scapular artery
What nerves innervate the levator scapulae
the dorsal scapular nerver and the C3 C4 cervical spinal nerves
Where does the rhomboid major attach (proximal and distal)
proximal attachment at the spinous process of T2-T5.
Distal attachment at the medial border of the scapula below the scapular spine
What nerve innervates the rhomboid major
The dorsal scapular nerve (C5)
What is the rhomboid major’s blood supply
the dorsal scapular artery
Where does the rhombiod minor attach (proximal and distal)
proximal attachment at the spinous process of C7 and T1
Distal attachment at the medial border of the scapula at the level of the scapular spine.
What nerve inntervates the rhomboid minor?
The dorsal scapular nerve (C5)
What is the rhomboid minor’s blood supply?
the dorsal scapular artery
Where does the Serratus posterior superior attach (proximal and distal)
Proximal attachment at nuchal ligament, spinous processes of C7 to T3.
Distal attachment at ribs 2-5
What nerves innervate the Serratus posterior superior?
Innervated by anterior rami of T2-T5 spinal nerves
What is the serratus posterior superior’s blood supply
Intercostal aa
Where does the serratus posterior inferior attach (proximal and distal)
Proximal attachment at spinous process of T11-L2.
Distal attachment at ribs 9-12
What nerves innervate the serratus posterior inferior?
Innervated by anterior rami of T9-T12 thoracic spinal nerves
What is the serratus posterior inferior’s blood supply?
intercostal aa
Where does the splenius cervicis attach (proximal and distal)
Proximal attachment at spinous process of T3-T6
Distal transverse process of C1-C3
Where does the Splenius capitis attach
Proximal attachment at C7-T3 and lower 1/2 of ligamentum nuchae.
Distal attachment at mastoid process and lateral 1/3 of superior nuchal line.