Muscles of the Neck, Shoulder, Thorax, Abdomen Flashcards
superficial neck muscle which originates along the clavipectoral fascia and inserts at the inferior border of the body of the mandible. The action of this muscle is to elevate the skin of the neck
platysma
what is the origin, insertion, action, and innervatior of the Sternocleidomastoid
origin: manubrium of the sternum and clavicle
insertion: mastoid process of the temporal bone
action: flexion of the head (if both sides are innervated stiumultaneusly) or rotation of the head toward the opposite side (if only one side is innervated)
Innervation: CN XI, Accessory Nerve
what is the origin, insertion, action, and innervation of the trapezius?
origin: skull, cervical and thoracic vertebrae
insertion: clavivle, acrombion, spine of scapula
action: upward rotation, elevation and depression of the scapula
innervation: (CN XI) Accessory Nerve
what is the origin, insertion, action, and innervation of the deltoid?
origin: spine of the scapula, acromion, clavicle
insertion: deltoid tuberosity of the humerus
action: flexion, extension, abduction medial and latrial rotation of the arm at the shoulder joint
innervation: axially nerve
what is the origin, insertion, action and innervation of the pectoralis major?
origin: clavicular part- medial half of the clavicle, sternocostal part- sternum and first 5 costal cartilages
insertion: crest of greater tubercle of humerus
action: adduction, medial rotation and flexion of the arm at the shoulder joint
innervation: medial and lateral pectoral nerves
what is the origin, insertion, action and innervation of the pectoralis minor?
origin: ribs 2-5
insertion: coracoid process of the scapula
action: depression of the scapula
innervation: medial pectoral nerve
what is the origin, insertion, action and innervation of the serraatus anterior?
origin: ribs 1-8
insertion: medial border of the scapula
action: upward rotation of the scapula
innervation: long thoracic nerve
what is the origin, insertion, action and innervation of the external oblique?
origin: lower 8 ribs. interdigitates with the latissimus dorsi and serratus anterior muscles
insertion: iliac crest and rectus sheath via an apoheurosis
action: rotation and lateral flexion of the trunk, forced expiration
innervation: throacoabdominal nerves (t7-t11) and the subcostal nerves (t12)
what is the origin, insertion, action and innervation of the internal oblique?
origin: iliac crest
insertion: costal margin. rectus sheath via aponeurosis, pubic crest
action: rotation and lateral flexion of the trunk, forced expiration
innervation: throacoabdominal nerves (t7-t11) and Subcostal nerves (t12)
what is the origin, insertion, action and innervation of the transversus abdominis?
origin: iliac crest, lower 6 costal cartilages and gascia of the back
insertion: rectus sheath via aponeurosis
action: rotation and lateral flexion of the trunk, forced expiration
innervation: throacoabdominla nerves (t7-t11) and subcoastal nerves (t12)
what is the origin, insertion, action and innervation of the rectus abdominis?
origin: xiphoid process and costal cartilages of rib 5-7
insertion: pubic crest and symphysis
action: flexion of the trunk
innervation: throaco-abdominal nerves (t7-t12) and subcostal nerves (t12)
what does the aponeurosis of the external oblique form?
inguinal ligament
which muscles share the
origin: iliac crest
action: rotation and laterial flexion of the trunk, forced expiration
innervation: throaco-abdominal nerves t7-t11 and subcostal nerves t12
transversus abdominis
internal oblique
which muscles share the
action: rotation and laterial flexion of the trunk, forced expiration
innervation: throaco-abdominal nerves t7-t11 and subcostal nerves t12
transversus abdominis
internal oblique
external oblique
which muscles share the
innervation: throaco-abdominal nerves t7-t11 and subcostal nerves t12
rectus abdominis
transverse abdominis
internal oblique
external oblique
which muscles share the innervation of the accessory nerve?
trapezius
sternocleidomastoid
