Exam 2: Muscles of Head, Neck, and Trunk Flashcards Preview

Anatomy A-215 > Exam 2: Muscles of Head, Neck, and Trunk > Flashcards

Flashcards in Exam 2: Muscles of Head, Neck, and Trunk Deck (40)
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31

Superficial Thorax Muscles

-move upper limb, not ribs

32

Deep Thorax Muscles

-respiration muscles 

33

Diaphragm

-contraction pulls the central portion down, increasing vertical dimensions of thorax

-deep thorax muscle

 

34

External Intercostals

-elevate ribs during inhalation

-fibers run inferomedially

-deep thorax muscle

 

35

Internal Intercostals

-depress ribs during exhalation

-fibers run inferolaterally 

-deep thorax muscle

36

External Abdominal Oblique

-bilaterally flex vertebral column andcompress abdominal wall

-unilaterally: lateral flexion of vertebral column 

-fibers run inferomedially 

-similar to external intercostals 

37

Internal Abdominal Oblique

-bilaterally: flex vertebral column and compress abdominal wall

-unilaterally: lateral flexion of vertebral column 

-fibers run inferolaterally 

-similar to inferior intercostals

38

Transversus Abdominus 

-bilaterally: flex vertebral column and compress abdominal wall

-unilaterally:laterally flexes vertebral column

39

Rectus Abdominus

-flex vertebral column and compress abdominal wall 

-straight fibers

40

Muscles of the Pelvic Floor and Perineum

-close inferior opening of pelvis

        -support the pelvic organs

-assist with defecation, voluntary part of urination, and childbirth