Inspiratory Muscles Flashcards
what is the diaphragm shaped like?
a parachute
what is the primary inhalation muscle?
diaphragm
When the diaphragm contacts does it go down or up?
down/lowers
What muscle separates the thoracic cavity and abdominal cavity?
diaphragm
How far can the diaphragm contract for a deep forced inhalation?
10 cm
What nerve innervated the diaphragm?
Phrenic
Sternal Origin: xiphoid process of sternum
Course: superiorly and medially
Insertion: central tendon
Diaphragm, sternal head
Costal Origin: inner surface of ribs 7-12 and their cartilage
Course: superiorly and medially
Insertion: central tendon
Diaphragm, costal head
Vertebral Origin: corpus of lumbar vertebrae 1-4 and transverse process of L1
Course: superiorly and medially
Insertion: central tendon
Diaphragm, vertebral head
Origin: inferior border of immediately superior rib
Course: obliquely inferior and towards sternum
Insertion: superior border of immediately inferior rib
External intercostals
Origin: Mastoid process
Insertion: sternum and clavicle
Sternocleidomastoid
Origin: transverse process C3-C6
Insertion: 1st rib
Scalenus anterior
Origin: transverse process C2-C7
Insertion: 1st rib
Scalenus medius
Origin: transverse process
Insertion: 2nd rib
Scalenus posterior
Origin: sternum and clavicle
Insertion: humerus
Pectoralis Major
What is the largest chest muscle?
Pectoralis Major
Origin: ribs 2-5
Insertion: scapula
Pectoralis Minor
Origin: clavicle
Insertion: rib #1
subclavius
origin: superior surfaces of ribs 1-9
Insertion: vertebral border of the scapula
serratus anterior
Origin: spinous processes C2-T12
Insertion: scapula, superior surface of clavicle
Trapezius muscle
Origin: transverse process of C1-C4
Insertion: medial border of the scapula
Levator scapulae
Origin: deep to trapezius; T2-T5
Insertion: scapula
rhomboideus Major
Origin: deep to trapezius, C7-T1
Insertion: medial border of the scapula
Rhomboideus Minor
Is the serratus posterior superior or inferior for inhalation?
Serratus posterior superior
Origin: Transverse processes of C7-T11 vertebrae
Insertion: run downward laterally inserting to rib below or next rib
Levator costarum
Origin: spinous processes C7, T1-T3,
Insertion: ribs 2-5
Serratus posterior Superior
Origin: spinous processes T11-T12, L1, L3
Insertion: ribs 7-12
Serratus posterior Inferior