Ch 10: All Of The Muscles Flashcards
Frontalis
-Located front of the forehead
-Raises the eyebrows
Orbicularis oculi
-Located around the eye
-Closes the eye when blinking squinting
Zygomaticus
-Located over the cheeks and up toward the eyes
-Draws your mouth upwards when laughing
Orbicularis Oris
-Located around the mouth
-Closes the mouth and purses the lips
Buccinator
-Located on the side of the mouth
-Assists in smiling and blowing as well as chewing
Temporalis
Located above the ear on the side of the head
-Aids in closing the jaw
Masseter
Located at the jaw
-Closes the jaw
Sternocleidomastoid
Located laterally on the neck
-Flexes the head downward
Trapezius (head)
Located on shoulder and upper neck
-Extends the head and flexes to one side also elevates the shoulder
External intercostals
Superficially between the ribs
-Elevate the ribs during inspiration
Internal intercostals
Lie deeper than the external intercostals
-Depress the ribs during forced exhalation
Diaphragm
Located inferior to the lungs inside the rib cage
-Enlarges the thorax to trigger inspiration
Rectus abdominis
Aaaaaaaaaaabs
-Flexes the lumbar region of the spinal column to cause bending at the waist
Transverse abdominal
To the side of the abdominal muscles under the external oblique
-Compresses the contents of the abdomen
Internal oblique
Underneath the external oblique
-Stabilizes the spine and permits rotation at the waist
External oblique
Outermost abdominal muscle
-Stabilizes the spine and aids in forceful expiration