Exam 2 Flashcards
(165 cards)
5 muscles that originate on the vertebral column or skull
Trapezius Rhomboid Major Rhomboid Minor Levator Scaula Latissimus Dorsi
Trapezius:
Origin - (4)
Insertion - (2)
Actions - (3)
Trapezius:
Origin - External Occipital Protuberance (EOP), Superior nuchal line, Ligamentous nuchae and C7-T12
Insertion - Clavicle and Acromion Process/Spine of Scapula
Actions - Stabilize Scapula, (upper) Elevate Scapula, (mid/lower) Adduct/Depress Scapula
Trapezius Nerve Supply:
Motor…
Sensory…
Motor innervation from Spinal Accessory Nerve (XI)
Sensory innervation from C3 and C4
Trapezius weakness can lead to… (2)
Deepening of shoulder
Shoulder drops
Rhomboid major and minor are (deep/superficial) to the trapezius.
Deep
Rhomboid Major:
Origin -
Insertion -
Origin - Spines of Upper Thoracic Vertebrae
Insertion - Vertebral Border of Scapula
Rhomboid Minor:
Origin -
Insertion -
Origin - Spines of lower cervical and first thoracic
Insertion - Vertebral border of scapula
Muscle deep to the trapezius on the side of the neck
Levator Scapula
Levator Scapula:
Origin - (1)
Insertion - (2)
Actions - (3)
Origin - Transverse Process of Upper Cervicals
Insertion - Superior Angle/Proximal Medial Border of Scapula
Actions - Elevate/Adduct/Stabilize Scapula
Innervation of Rhomboids and Levator Scapula
Dorsal Scapular Nerve (C5)
Damage to the Dorsal Scapular Nerve and/or C5 would result in… (2)
Difficulty completely adducting scapula
Scapula sits further from midline
Latissimus Dorsi: Origin - (4) Insertion - (1) Actions - (2) Nerve Supply (1)
Origin - Spines of lower thoracic and lumbar vertebrae, Thoracodorsal Fascia, Crest/Ilium, Lower Ribs
Insertion - Intertubercular Groove of Humerus
Actions - Extends/Adducts/Medial-Rotate Humerus, Forced Expiration
Nerve Supply - Thoracodorsal (C6, C7, C8)
Depression found at the LOWER portion of the latissimus dorsi…
Three landmarks…
Significance…
Lumbar Triangle
Latissimus Dorsi, Ilium Crest, External Oblique
Location of posterior abdominal wall hernia
Depression at the SUPERIOR border of the latissimus Dorsi…
Three landmarks…
Significance…
Triangle of Auscultation
Latissimus Dorsi, Trapezius, Vertebral Border of Scapula
Where lung sounds can be heard
Broad muscular sheet that passes posteriorly around thoracic cage from an extensive costal attachment to a more limited scapula attachment.
Serratus Anterior
Serratus Anterior: Origin: Insertion: Actions: (3) Nerve Supply:
Origin: Upper 8 or 9 ribs
Insertion: Vertebral Border of Scapula
Actions: Stabilize and Abduct Scapula, Forced Inspiration (when humerus abducted)
Nerve Supply: Long Thoracic (C5, C6, C7)
Winged Scapula
Long Thoracic Nerve Palsy
Signs of Long Thoracic Nerve Palsy… (2)
Vertebral Border of Scapula Raised from posterior thoracic wall.
Difficulty raising the arm overhead
Three causes os long thoracic nerve palsy
Trauma/Subluxation
Traction Injuries involving shoulder
Recumbency (for an extended period)
6 Scapular Muscles
Deltoid Supraspinatus Infraspinatus Subscapularis Teres Minor Teres Major
4 rotator cuff muscles
Supraspinatus
Infraspinatus
Subscapularis
Teres Minor
Large muscle forms the roundness of the shoulder and is divided into three portions, each with a different origin and actions.
Deltoid
Deltoid: Origin: (3) Insertion: Actions (3) Nerve Supply:
Origin: Clavicle, Acromion Process, Spind of Scapula
Insertion: Deltoid Tuberosity of Humerus
Actions Supply: Flex + Medially Rotate Humerus, Abduct Humerus, Extension + Laterally rotate humerus
Nerve Supply: Axillary Nerve (C5 & C6)
Atrophy of the deltoid (_______ ________).
Due to…
Crutch Paralysis
(due to) Axillary Nerve Injury