Muscles of resp, mech of insp, joints

Muscles of resp, mech of insp, joints - 1 MUSCLES OF...

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1. MUSCLES OF RESPIRATION Complete the following table: Type of breathing Muscles responsible Relaxed Inspiration EXTERNAL INTERCOSTALS, INTERCHONDRAL PORTION OF INTERNAL INTERCOSTALS, DIAPHRAGM ( E xternals E levate the ribs) Relaxed Expiration NONE (PASSIVE RECOIL OF RIB CAGE AND PULMONARY COMPLIANCE OF LUNGS) Forced Inspiration ALL MUSCLES OF RELAXED INSPIRATION + PECTORALIS MAJOR/MINOR, STERNOCLEIDOMASTOID, SCALENES Forced Expiration INTERNAL INTERCOSTALS, TRANSVERSUS THORACIS, QUADRATUS LUMBORUM (stabilizes 12 th rib), ABDOMINAL MUSCLES Fill in the blanks: (see diagram in April, p.247) Synergist muscles act on the same side of the axis of rotation or are perpendicular to each other on the opposite side of the axis of rotation. Antagonist muscles act on the opposite side of the axis of rotation or are perpendicular to each other on the same side of the axis of rotation. 2. MECHANICS OF INSPIRATION Complete the following table: Aspect of inspiration Increase in which diameter (transverse or anteroposterior)? “Bucket-handle” effect TRANSVERSE THORACIC “Pump-handle” effect ANTERIOR-POSTERIOR Rotation effect TRANSVERSE THORACIC The bucket-handle effect is due to elevation of the ribs as they rotate upwards in inspiration. The pump-handle effect is due to elevation of the sternum as a result of upward rotation of the crossed axes. The rotation effect is due to rotation of the ribs (which are concave on their interior surface) on inspiration.
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3. BREATHING DIFFICULTIES
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Muscles of resp, mech of insp, joints - 1 MUSCLES OF...

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