Respiratory System: Muscles of Exhalation Flashcards
Abdominal Muscles
Rectus Abdominis
External Oblique
Internal Oblique
Transversus Abdominis
Rectus Abdominis
Superficial
Enveloped in Abdominal aponeurosis
Rectus Abdominis Attachments
Pubic bone
Sternum
Costal Cartilage 1-7
(HTR: abs-> pubis; abs -> stern; abs -> six pack +1 +1)
Rectus Abdominis Function
Pull down Sternum and ribs (T& AP)
Compress abdominal viscera (pushes diaphragm up)
External Oblique
Superficial, Fibers run hand in vest pocket
External Oblique Attachments
Ilium
Lower ribs
Abdominal Aponeurosis
HTR: next to pubis (rectus); next to aponeurosis
External Oblique Functions
Compress viscera (pushes up dia)
Lowers ribs
Internal Oblique
Deep to external oblique
Fibers run hand groping chest
Internal Oblique Attachments
Ilium
lower ribs
Abdominal Aponeurosis
Inguinal ligament
HTR: SAME AS EXTERNAL + inguinal ligament
Internal Oblique Functions
Compress Viscera
Lowers ribs
Transversus Abdominis
Side to side fibers
deepest muscle
Transversus Abdominis Attachments
Ilium
Lower ribs
Abdominal Aponeurosis
Inguinal Ligament
Lumbar fascia
HTR: Internal Oblique + Lumbar Fascia from Lats (backest)
Transversus Abdominis Function
Compress Viscera
Lower ribs
Rib cage Muscles
Internal Intercostals
Subcostals
Transversus Thoracis
Serratus Posterior Inferior
Quadratus Lumborum
Internal Intercostals
Deep to external intercostals
may activate all together or individually
Fibers run hand groping chest formation
Internal Intercostals Attachments
Upper border of lower rib to lower border of upper rib
fills space between rib except posterior
Internal Intercostals Function
Lowers ribcage
EFFECTIVE
Contacts 75% of lungs surface area
Subcostals Attachments
Ribs near vertebral column
Attaches to ribs 1+ higher
highly variable placements across people
HTR: underneath costals back -> vertebrae
Subcostals Function
Pulls down ribs
Transversus Thoracis
Inside front wall of chest/ribs
Transversus Thoracis Attachments
Lower sternum
Ribs 2-6
HTR: underneath ribs right behind sternum, TT-> 2-6
Serratus Posterior Inferior Attachments
Lower Thoracic to upper lumbar vertebrae
Lower ribs
HTR: ALL the lower regions of ribcage
Serratus Posterior Inferior Functions
Pulls ribcage down
EFFECTIVE
Quadratus Lumborum Attachments
Ilium
Rib 12 (LAST ONE)
Quadratus Lumborum Function
Pulls ribcage down