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MUSC Muscles
Back/Shoulder
87
Anatomy
Professional
06/04/2009

Additional Anatomy Flashcards

 


 

Cards

Term
Innervation of Splenius Capitus
Definition
Dorsal Rami of spinal nerves
Term
Origin of Splenius Capitus and Cervicis
Definition
Spinous processes of cervical and upper thoracic vertebrae
Term
Insertion of Splenius Capitis
Definition
Mastoid process of temporal bone
Term
Insertion of Splenius Cervicis
Definition
Transverse process of middle to lower cervical vertebrae
Term
Action of Splenius capitus and cervicis
Definition

Acting alone they help rotate head

Acting together extend head and neck

Term
Action of Erector Spinae
Definition
Stabalize and keep spine erect, extension, and rotation
Term

Innervation of Erector Spinae muscles

(Illocostalis, Longissimus, Spinalis)

Definition
Dorsal Primary Rami of Spinal nerves
Term
Origins of Erector Spinae
Definition

Posterior iliac crest or posterior sacrum

Spinous processes and supraspinous ligaments

Term
Insertion of Illocostalis
Definition

Angles of lower ribs or transverse processes of cervical vertebrae

Depends which one (lumborum, thoracis, cervicis)

Term
Insertion of longissimus
Definition

Transverse process in thoracic and cervical regions, mastoid process of occipital bone

depends on if thoracis, cervicis, capitis

Term
Insertion of spinalis
Definition

Spinous process of upper thoracic region and skull

(depends if thoracis,cervicis, capitis)

Term
Innervation of Transversospinalis
Definition
Dorsal primary rami of spinal nerves
Term
Origination of transversospinalis
Definition
Transverse process of vertebrae
Term
Main Action of Transversospinalis
Definition
Stabilize vertebrae
Term
Insertion of Transversospinalis
Definition
spinous processes of vertebrae
Term
Number of segements each of the transversospinalis muscles traverse
Definition

Semispinalis 4-6 segments

Multifidus 2-4 segments

rotatores brevis 1 segment

rotatores longus 2 segments

Term
Interspinalis and Intertransversarii are found in what two vertebral locations
Definition
Lumbar and cervial regions
Term
Interspinalis Origin
Definition
Spinous process
Term
Interspinalis insertion
Definition
Spinous process of vertebrae superior to the vertebrae of origin
Term
Action of interspinalis
Definition
Aid in extension and rotation of vertebral column
Term
Action of Intertransversarii
Definition
Aid in lateral bening of vertebral column
Term
Origin of Intertransversarii
Definition
Transverse process of vertebrae
Term
Insertion of Intertransversarii
Definition
Transverse process of adjacent vertebrae
Term
Innervation of Intertransversarii and interspinalis
Definition
Dorsal primary rami of spinal nerves
Term
Action of Levatores Costarum
Definition
Elevate ribs aids in respiration
Term
Origin of Levatores Costarum
Definition
Tips of transverse processes on C7 - T11
Term
Insertion of Levatores Costarum
Definition
attaches to ribs
Term
Innervation of Levatores Costarum
Definition
Dorsal rami of C8-T11 spinal nerves
Term
Origin of Trapezius
Definition
vertebral column from middle thoracic to neck depending on area of trap
Term
Insertions of trapezius
Definition
Scapula
Term
Action of Trapezius
Definition

upper fibers elevate scapula

middle fibers retract scapula

lower fibers pull medial border of scapula downward

 

all together increase abduction range of humerus by rotating scapula upward

Term
Innervation of Trapezius
Definition
Spinal portion of accessory nerves
Term
Latissimus Dorsi Insertion
Definition
Humerus
Term
Latissimus Dorsi Origin
Definition
lumbar fascia and lower six spinous processes of thoracic vertebrae
Term
Innervation of Latissimus dorsi
Definition
Thoracodorsal nerve
Term
Latissimus dorsi action
Definition
Extends, adducts, medially rotates arm
Term
Levator Scapulae origin
Definition
Transverse processes of four cervical vertebrae
Term
Levator scapulae insertion
Definition
medial border of scapula
Term
Innervation of Levator Scapulae
Definition
Dorsal Scapular Nerve
Term
Action of Levator Scapulae
Definition
Elevates scapula
Term
Rhomboid Major origin
Definition
Thoracic Spines and supraspinous ligaments
Term
Rhomboid Major innervation
Definition
Dorsal Scapular Nerve
Term
Insertion of Rhomboid Major
Definition
Medial border of scapula
Term
Innervation of Rhomboid Minor
Definition
Dorsal Scapular Nerve
Term
Origin of Rhomboid Minor
Definition
Spines of lower cervial and upper thoracic vertebrae and ligamentum nuchae
Term
Insertion of Rhomboid Minor
Definition
Medial border of scapula
Term
Action of Rhomboid Minor
Definition
Elevates Scapula
Term
Supraspinatus Origin
Definition
Supraspinous fossa of scapula
Term
Supraspinatus Insertion
Definition
Greater tuberosity of humerus
Term
Supraspinatus Action
Definition
Abducts arm and stabilizes shoulder
Term
Supraspinatus innervation
Definition
suprascapular nerve
Term
Infraspinatus origin
Definition
infraspinous fossa of scapula
Term
Infraspinatus insertion
Definition
Greater tuberosity of humerus
Term
Innervation of infraspinatus
Definition
Suprascapular nerve
Term
Infraspinatus action
Definition
Laterally rotates arm
Term
Subscapularis Innervation
Definition
Subscapular nerve
Term
Subscapularis Origin
Definition
Subscapular fossa
Term
Subscapularis insertion
Definition
lesser tuberosity of humerus
Term
Action of subscapularis
Definition

medially rotates arm

stabilizes shoulder

Term
Pectoralis Major Origin
Definition

Anterior surface bicipital clavicle,

Manubrium sternum,

upper six costal cartilages

Term
Pectoralis Major Insertion
Definition
Groove of humerus lateral lip
Term
Innervation Pectoralis Major
Definition
Medial and lateral Pectoral Nerves from Brachial Plexus
Term
Action of Pectoralis Major
Definition
Adducts arm and rotates arm medially
Term
Pectoralis Minor Origin
Definition
Outer surface of ribs 3-5
Term
Pectoralis Minor Insertion
Definition
Coracoid process of scapula
Term
Pectoralis Minor Innervation
Definition
Medial pectoral Nerve from brachial plexus
Term
Action Pectoralis Minor
Definition

Depresses point of shoulder,

Can elevate ribs of origin (3-5) if the scapula is fixed

Term
Subclavius Origin
Definition
First costal cartilage
Term
Subclavius Insertion
Definition
Inferior surface of clavicle
Term
Innervation of subclavius
Definition
Nerve to subclavius
Term
Subclavius action
Definition

Depresses clavicle

Steadies clavicle during shoulder girdle movements

Term
Serratus Anterior Origin
Definition

Outer surface of upper eight ribs

fascia covering spaces between ribs

Term
Serratus Anterior Insertion
Definition
Scapula (Superior and inferior angle, medial border)
Term
Innervation of Serratus anterior
Definition
Long thoracic Nerve
Term
Serratus anterior action
Definition

Protracts scapula and pectoral girdle

Rotates scapula upward (especially during humeral abduction)

Term
Deltoid Insertion
Definition
Deltoid tuberosity of humerus
Term
Deltoid Origin
Definition

Anterior border of clavicle,

acromion process,

lower lip of crest of the scapular spine

Term
Deltoid Innervation
Definition
Axillary nerve
Term
Deltoid Action
Definition

Intermediate (strong abductor of arm)

Anterior fibers (flex and medially rotate arm)

Posterior fibers (extend and laterally rotate arm)

 

Term
Teres Major Origin
Definition
Dorsal surface of lateral border of scapula
Term
Teres major insertion
Definition
Medial lip of bicipital groove of humerus
Term
Innervation of Teres Major
Definition
Lower subscapular nerve
Term
Action of Teres Major
Definition

Medially rotates arm

Adducts arm,

Stabilizes shoulder joint

Term
Teres Minor Action
Definition

Laterally rotates arm,

Stabilizes joint

Term
Teres Minor innervation
Definition
Axillary nerve
Term
Teres minor insertion
Definition

Greater tuberosity of humerus

Capsule of shoulder joint

Term
Teres minor origin
Definition
Dorsal surface of scapula
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