Diaphragm M.

1
Diaphragm M.
Origin Internal circumference of lower
thorax Ventral xiphoid process Lateral lower
6-7 ribs Dorsal upper lumbar vertebrae Insertion
central tendon Action draws down central
tendon increasing vertical dimension of the
thorax Nerve supply Phrenic nerve (C3-5)
Figure 5.13
2
Views of the Thorax
Transverse Section
Lateral
From Snell
3
Rectus abdominus M.
Origin pubis Insertion cartilage of
R5-R7 xiphoid process Action compresses the
abdominal contents Nerve supply Intercostal N.
(7-11)
Figures 11.1, 11.12
4
Transverse abdominus M.
Origin lower ribs vertebral column anterior
part of iliac crest Insertion abdominal
aponeurosis Action compresses abdominal
contents Nerve supply Intercostal N. (7-11)
Figure 11.1
5
Internal oblique M.
Origin anterior part of iliac crest inguinal
ligament Insertion cartilages of lower 3-4
ribs abdominal aponeurosis Action compresses
the abdominal contents Nerve supply Intercostal
N. (7-11)
Figures 11.1, 11.12
6
External oblique M.
Origin R5-R12 Insertion anterior part of
iliac crest abdominal aponeurosis Action
compresses the abdominal contents Nerve supply
Intercostal N. (7-11)
Figures 11.1, 11.12
7
Abdominal muscles Transverse section
Figures 11.5
8
Abdominal muscles
From Snell
9
Abdominal muscle actions
Figures 11.9, 11.10
10
Respiratory system is redundant

• When faced with a number of options, which one do
  you use?
• Considerations
• Mechanical advantage
• Assistance/opposition to environmental forces
• Muscle mass
• Ability to effect thoracic volume change

11
Respiratory Function
12
Measuring Respiratory Function Spirometry
13
Spirometry
14
Lung Volumes Capacities
15
Rest vs. Speech Breathing
16
Respiratory Function Aerodynamics
Respiratory Measure
Vital Capacity
Residual Volume
Resting Expiratory End Level
Rest Breathing Speech Breathing
Tidal Volume
Inspiratory/Expiratory Timing
Respiratory Rate
Alveolar Pressure
Average Flow
Remember a few, calculate the rest