MM StsTx300 Flashcards
O - TVP of C1-C4
I - superior angle & superior portion of scapula’s medial border
Levator Scapulae
elevation of scapula @ ScC jt; extension, lateral flexion, ipsilateral rotation of neck @ spinal jts
N- dorsal scapular nerve
B- dorsal scapular artery
From a rib to the rib immediately superior (within an
intercostal space)
External and Internal Intercostals
ACTIONS:
- The intercostal muscles can elevate and depress the ribs at the sternocostal and costospinal joints for breathing (the upper intercostals are generally more active with elevation for inhalation; the lower intercostals are generally more active with depression for exhalation).
- Both external and internal intercostals laterally flex the
trunk at the spinal joints.
- The external intercostals contralaterally rotate the trunk at the spinal joints.
-The internal intercostals
Internal surfaces of the lower six ribs, the xiphoid process
of the sternum, and the anterior surfaces of L1-L3 to the
central tendon of the diaphragm (located in the center of
the muscle)
Diaphragm
ACTIONS:
- Increases the volume of the thoracic cavity, allowing the
lungs to expand for inspiration
External occipital protuberance, medial 1/3 of the superior
nuchal line, nuchal ligament, and the spinous processes
of C7 through T12 to the lateral 1/3 of the clavicle, acromion
process, and spine of the scapula
Trapezius
- Upper trapezius: elevates, retracts, and upwardly rotates
the scapula at the scapulocostal joint; extends, laterally
flexes, and contralaterally rotates the head and neck at the
spinal joints
- Middle trapezius: retracts the scapula at the scapulocostal
joint
- Lower trapezius: depresses, retracts, and upwardly rotates
the scapula at the scapulocostal joint
Anterolateral surfaces of ribs one through nine to the anterior
surface of the entire medial border of the scapula
Serratus Anterior
-Protracts and upwardly rotates the scapula at the scapulocostal joint
- Upper fibers can also elevate and lower fibers can also
depress the scapula
Medial half of the clavicle, sternum, and the costal cartilages
of ribs one through seven to the lateral lip of the
bicipital groove of the humerus
Pectoralis Major
ACTIONS:
- Entire muscle: adducts, medially rotates, and horizontally
flexes the arm at the shoulder joint; protracts the scapula
at the scapulocostal joint
- Clavicular head: flexes the arm at the shoulder joint
- Sternocostal head: extends the arm at the shoulder joint
(from a position of flexion to anatomic position);
depresses the scapula at the scapulocostal joint
Ribs three through five to the medial surface of the coracoid
process of the scapula
Pectoralis Minor
- Protracts, depresses, and downwardly rotates the scapula
at the scapulocostal joint
- Elevates ribs three through five at the sternocostal and
costospinal joints
First rib at the junction with its costal cartilage to the
middle lh of the inferior surface of the clavicle
Subclavius
- Depresses, protracts, and downwardly rotates the clavicle
at the sternoclavicular joint
- Elevates the first rib at the sternocostal and costospinal
joints
Manubrium of the sternum and the medial 1/3 of the clavicle
to the mastoid process of the temporal bone and the
lateral 1/2 of the superior nuchal line of the occiput
SCM
ACTIONS:
- Flexes the lower neck and extends the head and upper
neck at the spinal joints
- Laterally flexes and contralaterally rotates the head and
neck at the spinal joints
- Elevates the sternum and clavicle
External occipital protuberance and medial ‘A of the
superior nuchal line of the occiput, entire nuchal ligament,
and the spinous process of C7 to the lateral clavicle
and the acromion process of the scapula
Upper Trapezius
ACTIONS:
- Elevates, retracts, and upwardly rotates the scapula at the
scapulocostal joint
- Extends, laterally flexes, and contralaterally rotates the
head and neck at the spinal joints
O- inferior nuchal ligament & SPs of C7-T4
I - mastoid process and lateral 1/3 of superior nuchal line
Splenius Capitis A-extension, lateral flexion & ipsilateral rotation of head & neck @ spinal jts N-cervical spinal nerve B-occipital artery
O- SP of C2
I- lateral ½ of inf nuchal line
Rectus capitis posterior major (RCPMaj)
A- extension of head @ C0/C1 jt
N- suboccipital nerve
B- occipital & vertebral artery
O- posterior tubercle of C1
I- medial ½ of inf nuchal line
Rectus capitis posterior minor (RCPMin)
A- extension & protraction of the head @ C0/C1 (atlanto-occipital) jt
N- suboccipital nerve
B- occipital & vertebral artery
O- SP of C2
I- TVPs of C1
Obliquus capitis inferior (OCI)
A- ipsilateral rotation of C2 @ C1/C2 jt (atlanto-axial jt)
N- suboccipital nerve
B- occipital & vertebral artery
O- TVPs of C1
I- occiput – b/t superior & inferior nuchal lines
Obliquus capitis superior (OCS) A- protraction & contralateral rotation of head @ C0/C1 joint N- suboccipital nerve B- occipital & vertebral artery
