Extrinsic muscle
Originate in one area and insert into another
intrinsic muscles
Fully contained within the structure under consideration
What are the superficial muscles of the back?
trapezius and latissimus dorsi
What are the attachments of the trapezius muscle?
External occipital protuberance, spinal process, spine of scapula and acromion
What are the actions of the descending trapezius?
elevate the scapula by shorting the distance.
What are the actions of the transverse trapezius?
Retraction of the scapula by contracting
What are the actions of the Ascending trapezius?
Depression of the scapula
Descending Trapezius
0
Transverse Trapezius
0
Ascending Trapezius
0
Trapezius innervation
accessory nerve (cranial nerve XI)
Accessory nerve origin
spinal cord segments C1-C6
What foramen does the accessory nerve enter?
foramen magnum
What foramen does the accessory nerve exit?
jugular foramen
Latissumus dorsi
0
Where does the latissimus dorsi attach?
intertubercular bicipital groove
What is another place the latissimus dorsi attaches
thoracolumbar fascia and iliac crest
What is the action of the latissimus dorsi?
extends, adducts, and medially rotates humerus
Latissimus dorsi innervation
thoracodorsal nerve
thoracodorsal nerve
0
triangle of ascultation
0
rhomboid major
0
Rhomboid minor
0
Where do the rhomboids attach?
medial border of scapula
Where do the rhomboids insert?
spinous process and nuchal ligament
What is rhomboid major and minors action?
medially rotate and retract the scapula
When working with the Levator scapula the rhomboids help to ?
elevate the scapula
Levator scapula
0
What is the action of the Levator scapula?
Elevation of the scapula
Where does the levator scapulae insert?
superior angle of scapula and cervical vertebrae.
dorsal scapular nerve
0
Splenius muscle
0
Where does the splenius attach?
mastoid process
What is the bilateral action of the splenius ?
extension of the head
What is the unilateral action of the splenius ?
laterally flexion of the head
What is the ipsilateral action of the splenius ?
lateral rotation of the head
innervation of splenius capitis
dorsal rami
Serratus Posterior Inferior
0
Serratus Posterior Superior
0
serratus posterior inferior action
depress ribs during exhalation
serratus posterior superior action
elevates ribs in inspiration
erector spinae
0
Iliocostalis
0
Longissimus
0
Spinalis
0
What is the bilateral action of the erector spinae?
Extend the head and trunk
What is the unilateral action of the erector spinae?
lateral flexion
What is the ipsilateral action of the erector spinae?
rotate the trunk
Transversospinalis muscles
0
What is the action of the tranversospinalis muscles?
Allow for fine muscle movements and adjustments of the spine
semispinalis capitis
0
What is the bilateral action of the semispinalis capitis?
Extension of the head
What is the unilateral action of the semispinalis capitis?
lateral flexion of the head
suboccipital muscles
0
Rectus Capitis Posterior Major
0
Rectus Capitus Posterior Minor
0
Obliquus capitis inferior
0
Obliquus Capitus Superior
0
What is the inferior attachment of the rectus capitis posterior major?
Spinous process of C2
What is the Superior attachment of the rectus capitis posterior major?
Lateral inferior nuchal line
What is the inferior attachment of the rectus capitis posterior minor?
Posterior tubercle of C1
What is the superior attachment of the rectus capitis posterior minor?
Medial inferior nuchal line
What is the inferior attachment of the Obliquus capitis inferior?
Spinous process of C2
What is the superior attachment of the Obliquus capitis inferior?
Tranvers process of C1
What is the inferior attachment of the rObliquus capitis superior?
Tranverse process of C1
What is the Superior attachment of the Obliquus capitis superior?
Between superior and inferior nuchal lines
What is the action of the rectus capitis posterior minor?
extend the head
What is the bilateral action of the rectus capitis posterior major?
Extends the head
What is the unilateral action of the rectus capitis posterior major?
rotates the head
What is the bilateral action of the obliquus capitis superior?
Extends the head
What is the unilateral action of the obliquus capitis superior?
laterally flex head
What is the bilateral action of the obliquus capitis inferior?
extends the head
What is the unilateral action of the obliquus capitis inferior?
Rotates the head
Least occipital nerve
0
Greater occipital nerve
0
suboccipital nerve
0
suboccipital triangle
0
Accessory Nerve (XI)
...