All 0INAs

External Oblique

What muscles is this?

Pectoralis major - clavicular portion

What muscles is this?

TP of C3-6

Superior attachment of scalenus anterior

scalene tubercle of 1st rib

Inferior attachment of scalenus anterior

anterior rami of spinal nerves C3-6

Nerve innervation of scalenus anterior

lateral flex to the same side, elevate the first rib

Action of scalenus anterior

TP of C5-7

Superior attachment of scalenus medius

superior surface of 1st rib

Inferior attachment of scalenus medius

anterior rami of spinal nerves C3-8

Nerve innervation of scalenus medius

laterally flex to the same side, elevate the first rib

Action of scalenus medius

TP of C5-7

Superior attachment of scalenus posterior

external border of 2nd rib

Inferior attachment of scalenus posterior

inferior border of the mandible, skin and tissue of lower face

Origin of Platysma

cervical branch of facial nerve (CN VII)

Nerve innervation of Platysma

junction of the 1st rib with costal cartilage

Proximal attachment of Subclavius

inferior surface of medial 1/3 of clavicle

Distal attachment of Subclavius

Sternal - anterior surface of manubrium

Clavicular - medial 1/3 of clavicle

Inferior attachment of the sternocleidomastoid muscle

adduct and medially rotate the humerus, draw scapula anterior and inferior

Action of both the sternal and clavicular portion of the pectoralis major together

top and center of the hood (all parts)

Insertion of the diaphragm

Transversus Abdominis

What muscles is this?

Rectus Abdominis

What muscles is this?

internal oblique

What muscles is this?

Serratus anterior

What muscles is this?

internal intercostal muscles

What muscles is this?

External intercostal muscles

What muscles is this?

Pectoralis minor

What muscles is this?

Pectoralis major - sternocostal portion

What muscles is this?

Subclavius

What muscles is this?

Platysma

What muscles is this?

Sternocleidomastoid

What muscles is this?

Scalenus Posterior

What muscles is this?

Scalenus Medius

What muscles is this?

Scalenus Anterior

What muscles is this?

laterally flex to the same side, elevate 2nd rib

Action of scalenus posterior

fascia of deltoid and pectoralis major

Insertion of Platysma

lateral mastoid process, lateral 1/2 of superior nuchal line

Superior attachment of the sternocleidomastoid muscle

long thoracic nerve

Nerve innervation of serratus anterior

forward flexion, compress and support abdominal viscera

Bilateral action of internal oblique

internal oblique

What is 1?

draw down corners of mouth, draw skin superiorly when teeth are clenched

Action of Platysma

anchor and depress the clavicle

Action of Subclavius

Spinal accessory (CN XI)

Nerve innervation of the sternocleidomastoid muscle

ipsilateral flexion and contralateral rotation

Unilateral action of the sternocleidomastoid muscle

chin to chest, thrust chin forward, elevate manubrium and clavicle, thrust chest

Bilateral action of the sternocleidomastoid muscle

medial 1/2 of clavicle

Proximal attachment of the pectoralis major clavicular portion

Intertubercular groove of the humerus

Distal attachment of the pectoralis major clavicular portion

lateral and medial pectoral nerve

Nerve innervation of the pectoralis major clavicular portion

flexes humerus

Action of the pectoralis major clavicular portion

sternum, superior 6 costal cartilages, external obliques

Proximal attachment of the pectoralis major sternal portion

intertubercular groove of the humerus

Distal attachment of the pectoralis major sternal portion

lateral and medial pectoral nerve

Nerve innervation of the pectoralis major sternal portion

extends humerus

Action of the pectoralis major sternal portion

ribs 3-5 near costal cartilage

Proximal attachment of the pectoralis minor

superior border of medial surface of coracoid process of scapula

Distal attachment of the pectoralis minor

medial pectoral nerve

Nerve innervation of the pectoralis minor

stabilize scapula, draw it inferior and anterior to the thoracic wall

Action of the pectoralis minor

inferior border of the rib above

Superior attachment of the external intercostal muscles

superior border of the rib below

Inferior attachment of the external intercostal muscles

intercostal nerve

Nerve innervation of the external intercostal muscles

elevates ribs with forces expiration

Action of the the external intercostal muscles

inferior border of the rib above (from sternum to the angle of the rib)

Superior attachment of the internal intercostal muscles

superior border of the rib below

Inferior attachment of the internal intercostal muscles

intercostal nerve

Nerve innervation of the internal intercostal muscles

active with forced respirations

Action of the internal intercostal muscles

external surface of ribs 1-8

Proximal attachment of serratus anterior

inferior surface of medial border of scapula

Distal attachment of serratus anterior

protracts and hold scapula against thoracic wall, rotates the scapula

Action of serratus anterior

external surfaces of ribs 5-12

Origin of external oblique

linea alba, pubic tubercle, anterior half of the iliac crest

Insertion of external oblique

thoracoabdominal nerves

Nerve innervation of external oblique

contralateral rotation, lateral flexion

Unilateral action of external oblique

forward flexion, compress and support abdominal viscera

Bilateral action of external oblique

thoracolumbar fascia, anterior 2/3 of iliac crest, lateral 1/2 of inguinal ligament

Origin of internal oblique

inferior border of the ribs 10-12, linea alba, pecten pubis via conjoint tendon

Insertion of internal oblique

thoracoabdominal

Nerve innervation of internal oblique

contralateral rotation, lateral flextion

Unilateral action of internal oblique

internal surfaces of ribs 7-12, thoracolumbar fascia, iliac crest, lateral 1/3 of inguinal ligament

Origin of transverse abdominis

linea alba with aponeurosis of IO, pecten pubis via conjoint tendon, pubic crest

Insertion of transverse abdominis

thoracoabdominal

Nerve innervation of transverse abdominis

compress and support abdominal viscera

Action of transverse abdominis

pubic tubercle an dpubic symphysis

Origin of rectus abdominis

xiphoid process and costal cartilages of ribs 5-7

Insertion of rectus abdominis

thoracoabdominal

Nerve innervation of rectus abdominis

forward flexor, compress abdominal viscera, depress ribs, stabilize pelvis tilt while walking

Action of rectus abdominis

arcuate line

What is A?

tendinous intersection

What is A?

lina alba

What is B?

rectus sheath

What is C?

rectus sheath (aponeurosis of the external oblique)

What is D?

Conjoint tendon

What is E?

Stylohyoid

Digastric

Mylohyoid

Geniohyoid

What are the four suprahyoid muscles?

elevation of the hyoid bone, depression and retraction of mandible

What is the action of the suprahyoid muscles?

Sternohyoid

Sternothyroid

Thyrohyoid

Omohyoid

What are the four infrahyoid muscles?

depress the hyoid bone and mandible

What is the action of the infrahyoid muscles?

2 slps attach to posterior xiphoid

Origin of the sternal part of the diaphragm

slips attach to internal aspect of inferior 6 costal cartilages and adjoining ribs

Origin of the costal part of the diaphragm

musculotendinous bundles attaching to the anterior aspect of bodles L1-L5

Origin of the central part of the diaphragm

phrenic nerve

Nerve innervation of the diaphragm

chief muscle of inspiration, pulls down during contraction

Action of the diaphragm

Inguinal ligament

What is highlighted in blue?