What is the superior attachment of External Intercostals?
100
Inferior Attachment: internal aspect of superior margin of rib below
What is the inferior attachment of the innermost intercostal?
100
Medial and lateral pectoral nerves, clavicular head (C5,C6), sternocostal head (C6-T1)
What is the innervation of Pecotralis major?
100
Elevates ribs 2-5
What is the function of Serratus posterior superior?
100
Superior Attachment: Lateral edge of costal groove of rib above
What is the superior attachment of the internal intercostal muscles?
200
Lateral surfaces of upper 8-9 ribs and deep fascia overlying the related intercostal spaces
What is the origin of Serratus anterior?
200
Inferior Attachment: Superior margin of rib below deep to the attachment of the related external intercostal
What is the inferior attachment of the internal intercostals?
200
Long thoracic nerve C5-C7
What is the innervation of serratus anterior
200
Acts with internal intercostal muscles
What is the function of the innermost intercostal muscles?
200
most active during inspiration; supports intercostal space; moves ribs superiorly
What is the function of the external intercostal muscles?
300
Spinous processes T11-L3, supraspinous ligaments
What is the origin of Serratus posterior inferior?
300
costal surface of medial border of scapula
What is the insertion of serratus anterior?
300
Anterior rami of lower thoracic nerves T9-T12
What is the innervation of Serratus posterior inferior?
300
Depresses ribs 9-12 and prevents lower ribs from elevating when diaphragm contracts
What is the function of serratus posterior inferior?
300
most active during expiration; supports intercostal space, moves ribs inferioroly
What is the function of the internal intercostal muscles?
400
Lower portion of ligamentum nuchae, supraspinous ligaments, spinous processes C7 to T3
What is the origin of serratus posterior superior?
400
Lower border of ribs 9-11 lateral to angles
What is the insertion of Serratus posterior inferior
400
Anterior rami of Upper thoracic nerves: T2-T5
What is the innervation of Serratus posterior superior?
400
Protraction and rotation of the scapula; keeps medial border and inferior angle of scapula opposed to thoracic wall
What is the function of serratus anterior?
400
Superior Attachment: medial edge of costal groove of rib above
What is the superior attachment of the innermost intercostal muscles?
500
Clavicular head: anterior surface medial half of clavicle
Sternocostal head: anterior surface of sternum
First 7 costal cartilages
Sternal end of 6th rib
Apponeurosis of external oblique
What is the origin of Pectoralis major?
500
Upper border of ribs 2-5 lateral to their angles
What is the insertion of serratus posterior superior?
500
Intercostal nerves T1-T11
What is the innervation of the external, internal, and innermost intercostals?
500
Flexion, adduction, medial rotation of arm at glenohumeral joint
Clavicular head: flexion of extended arm
Sternocostal head: extension of flexed arm