Region 5: Forearm And Region 6 Thorax, Abdomen

Diaphragm

Action:inhalation

Dome-shaped, broad muscle: separates thoracic & abdominalpelvic cavities

External Intercostals

• group of muscles located between the ribs, superficial to the internal intercostals

Internal Intercostals

• located between the ribs, deep to the external intercostals

Rectus Abdominis

• Muscles that run vertically along the front of abdomen

• Responsible for flexing the trunk ( bending forward compressing abdominal cavity assisting with breathing by helping to control diaphragm

External obliques

• Muscle along the lateral abdominal wall

• Run from lower ribs down to pelvis

• Action flexes vertebral column

Internal obliques

Action: flex, laterally flex, rotate vertebral column; compress abdomen

Deep to external obliques and superficial to transverse abdominis

Transverse Abdominis

Action:Compress abdomen Deep

Deepest of the 3 muscle sheets; fibers connect horizontally

Inguinal ligament

set of two narrow bands in the inguinal area of the body(the groin) connects the oblique muscles in abdomen to the pelvis

Psoas Major

Action: flex vertebral column; flex hip

Major hip flexors muscle located in the lower back & pelvis

Brachioradialis

Action: Flex forearm; supinate(outward rotation), pronate(rotation of a body part inward or toward the midline of the body) radio-ulnar joints(return to relaxed postion)

Extensor Cari Radialis Longus

Action:Extend, abduct wrist

Extensor Carpi Radialis Brevis

Action: Extend, abduct wrist

Extensor Digitorum

Action: Extend fingers

Extensor Carpi Ulnaris

Action: Extend, adduct wrist ( towards body midline, ulnaris= pinky side)

Flexor Carpi Ulnaris

Action: Flex, adduct wrist

Palmaris Longus

Action: Flex wrist

Flexor Carpi Radialis

Action: Flex, abduct wrist