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Thorax Muscles/posterior neck/abdomen muscles
Thorax Muscles
54
Anatomy
Undergraduate 4
03/26/2013

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Cards

Term
Subclavius O
Definition
Rib 1
Term
Subclavius I
Definition
Inferior surface of clavicle
Term
Subclavius A
Definition
Stabilizes and depresses Clavicle (Holds clavicle down)
Term
Serratus Anterior O
Definition
Anterior and superior margins of Ribs 1-8
Term
Serratus Anterior I
Definition
Medial border of scapula (anterior surface)
Term
Serratus Anterior A
Definition
Scapula protraction; superior rotation of scapula
Term
Serratus posterior O
Definition
Superior: Spinous process of C7-T3
Inferior: Spinous processes of T11 - L2
Term
Serratus Posterior I
Definition
Superior: Lateral border of ribs 2-5
Inferior: Inferior border of ribs 8-12
Term
Serratus posterior A
Definition
Superior: Elevates ribs during inhalation- increases capacity of thoracic cavity
Inferior: Depresses ribs during exhalation
Term
Pectoralis minor O
Definition
ribs 3-5
Term
Pectoralis Minor I
Definition
Coracoid process of scapula
Term
Pectoralis minor A
Definition
Depression and protraction of scapula
Term
External Intercostals O
Definition
Inferior border of superior rib
Term
External intercostals I
Definition
Superior border of inferior rib
Term
External intercostals A
Definition
Elevates ribs during inhalation (Raises rib cages)
Term
Internal Intercostals O
Definition
Superior border of inferior rib
Term
Internal Intercostals I
Definition
Inferior border of superior rib
Term
Internal Intercostals A
Definition
Depresses ribs during exhalation
Term
Trapezius O
Definition
Superior nuchal line of Occipital bone, ligamentum nuchae; spinous processes of C7- T12
Term
Trapezius I
Definition
Clavicle; acromion process and spine of scapula
Term
Trapezius A
Definition
Superior fibers: elevate and superiorly rotate scapula
Middle fibers: retract scapula
Inferior Fibers: Depress scapula
Term
Rhomboideus major and minor are also in this category
Definition
as well as "back" upper torso
Term
Splenius Capitis O
Definition
Ligamentum Nuchae
Term
Splenius Capitis I
Definition
Occipital bone and mastoid process of temporal bone
Term
Splenius Capitis A
Definition
Unilateral action: turn head to the same side
Bilateral action: Extends head and neck
Term
Levator scapulae O
Definition
Dorsal tubercles of diapophyses of C1-C4
Term
Levator scapulae I
Definition
Superior angle and medial border of scapula
Term
Levator scapulae A
Definition
Elevates scapula and rotates inferior angle medially
Term
Sternocleidomastoid O
Definition
Manubrium and sternal end of clavicle
Term
Sternocleidomastoid I
Definition
Mastoid process of temporal bone
Term
Sternocleidomastoid A
Definition
Unilateral : Lateral flexion, rotation of head to opposite side
Bilateral: flexes neck
Term
Sternohyoideus O
Definition
Manubrium of sternum and medial end of clavicle
Term
Sternohyoideous I
Definition
Hyoid bone
Term
Sternohyoideous A
Definition
Depresses hyoid bone
Term
Sternothroideus O
Definition
posterior surface of manubrium of sternum
Term
Sternothyroid I
Definition
Thyroid cartilage of larynx
Term
Sternothyroid A
Definition
Depresses thyroid cartilage of larynx
Term
Scalenus O
Definition
Transverse processes of cervical vertebrae
Term
Scalenus I
Definition
Superior surface of 1st and 2nd ribs
Term
Scalenus A
Definition
Flex neck when 1st rib is fixed
elevate 1st and 2nd ribs during forced inhalation when neck is fixed
Term
External Oblique O
Definition
External and inferior borders of the inferior 8 ribs
Term
External Oblique I
Definition
Linea Alba (white line that runs down the middle)- vertical fibrous strip- by a broad aponeurosis; some to iliac crest
Term
External Oblique A
Definition
Unilateral: Lateral flexion of vertebral column; rotation of vertebral column to opposite side
Bilateral: Flexes vertebral column and compresses abdominal wall (Crunches)
Term
Linea Alba (not muscle)
Definition
O: Xiphoid process
I: PUbic Symphysis
A: separates left and right rectus abdominis muscles
Term
Umbilicus O
Definition
Used for visual ref
A: Usually between L3 and L5 vertebral level, but position is variable
Term
Rectus abdominis O
Definition
Superior surface of pubis near symphysis
Term
Rectus abdominis I
Definition
Xiphoid process of sternum; inferior surfaces of ribs 5-7
Term
Rectus Abdominis A
Definition
Flexes vertebral column; compresses abdominal wall
Term
Internal Oblique O
Definition
Lumbar fascia, inguinal ligament and iliac crest
Term
Internal oblique I
Definition
LInea alba, pubc crest, inferior rib surfaces (last 4 ribs); costal cartilages of ribs 8-10
Term
Internal Oblique A
Definition
Unilateral: lateral flexion of vertebral column rotation of vertebral column to oppposite side
Bilateral: Felxes vertebral column and compresses abdominal wall
Term
Transversus abdominis O
Definition
Iliac crest, cartilages of inferior 6 ribs; lumbar fascia; inguinal igament
Term
Transversus abdominis I
Definition
LInea alba and pubic crest
Term
Transversus abdominis A
Definition
Unilatereal: lateral flexion of vertral column
Bilateral: flexes vertebral column; compresses abdominal wall (HOld gut in)
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