Lecture 11 Flashcards Preview

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Flashcards in Lecture 11 Deck (21):

What is the Origin, Insertion and Movement of the External Intercostals

Origin: upper rib, tubricle

Insertion: rib below it

Movement: upward mevement, ribs moving upward


What is the Origin, Insertion and movement fo the Internal Intercostals

Origin: at rib 1 and connect to the rib below it

Insertion: into the carilogenus puart

Movement: elevating the rib cage and increase volumen in the thoracic cavity


What nerve innervates the levator costarum brevis and longus

intercostal spinal nerves


What is the origin of levator costarum brevis and longus

teh transverse processes of C7 and T1- T11


What is the insertion of levator costarum brevis

between the tubercle and angle of the rib


What is the insertion of levator costarum longus

two ribs below


What is the origin, insertion, course, job and innervation of Serratus posterior superior?

Origin: spinous processes of C7 and T1- T3

Insertion: angles of ribs 2-5

Course: down and laterally

Job: elevates ribs 2-5, impact on upper rib case

Innervation: intercostal nerve


What is the Origin, Insertion, Innervation, Course and Action of the Sternocleidomastoid? 

Origin: mastoid process of temporal bone of the skull

Insertion: superior end of manubrium of sternum adn superior surace of sternal end of clavicle

Innervation: Accessory CN XI

Course: fibers run downward medially and anteriorly

Action: INHALATION, muscle for deep breathing (accessory), raises sternum and clavicle during deep breathing, Rotate the head contralaterally and downward


What is the Origin, Insertion and Job of the scalenes

Origin: transverse process of C2-C7, upper cervicla vertebrae

Insertion: anterior; 1st rib, medial 1st rib, posterior 2nd rib (at the tubercle) 

Job: elevate Ribs 1 and 2


What are the parts of the Scalenes? 





What is the Origin, insertion, and motion of pectoralis major? 

Origin: entire length of the sternum, some cartilage of the sternal portion of the clavicle ventrally

Insertion: scapula (cracoid process)

Movement: upward and a little bit laterally --> if scapula is fixated, when muscle (pectoralis minor) contracts then it lifts the ribs


What is the origin and insertion of serratus anterior

origin: ribs 1-9 on the lateral side

Insertion: scapula, the vertebral boarder, when the scapula is stabilized the serratus anterior contracts and pulls the ribs ou tand upward, measure of last resort for dep breathing (inhalation, supplemental) 


What are the muscles that stabilize the scapulae?

levator scapulae

rhomboideus major and minor



Describe the levator scapulae

one on each side of the body, cervical vertebrae down to the lower border of the scapulae


Describe the rohmoideus major and minor

pulls down and laterally from the spinous processes of the upper thoracic vertebrae down and laterally to the medial border of the scapula


Describe the Trapezius

spinous processes of cervical and thoracic vertebrae up  and laterally to the acromium process of the scapulae and clavicle


What are the anterior thoracic muscles of inspiration? 

external intercostals

internal intercostals


What are the posterior throacic muscles of inspiration? 

levator costarum (brevis and longus) 

serratus posterior superior


What are the accessory muscles of the neck for inspiration? 

When are these muscles used? 



These muscles are used if the primary muscles of inspiration are not working however, they are not very effective


What are the Musclces of the Upper arem and Shoulder for inspiration? 

Pectoralis Major

Pectoralis Minor

Serratus Anterior



What are the muscles that stabalize the scapulae? 

Levator scapulae

Rhomboideus major

Rhomboideus minor