chapter 9- skeletal muscles

Question 1

this type of muscles have origins on parts of the axial skeleton and support the head and spinal column

• used in facial expression, chewing and swallowing
• aid in breathing, support and protection of the abdominal and pelvic organs

Answer 1

axial muscles

Question 2

a large muscle of facial expression that covers the cranium

Answer 2

occipitofrontalis

Question 3

this circular muscle of facial expression is around the eye

Answer 3

orbicularis oculi

Question 4

this circular facial muscle is around the mouth

Answer 4

orbicularis oris

Question 5

these two structures originate on zygomatic bone and attach to ________

Answer 5

zygomaticus major and zygomaticus minor

• attach to upper corner of the lip

Question 6

this is the large muscular sheet over neck and attached to bottom of lips

Answer 6

platsyma

Question 7

what are the 2 muscles that elevate the mandible?

Answer 7

masseter and termporalis

Question 8

what are the 2 muscles that move the mandible back and forth and side to side

Answer 8

medial pterygoid and lateral pterygoid

Question 9

this muscle compresses the cheek

Answer 9

buccinator

Question 10

muscle that allows us to frown

Answer 10

depressor anguli oris

Question 11

muscle that allows us to blink and close eyes

Answer 11

orbicularis oculi

Question 12

muscle that allows us to smile

Answer 12

zygomaticus major

Question 13

muscle that allows us to close our mouth and kiss

Answer 13

orbicularis oris

Question 14

muscle that allows us to wrinkle forehead and raise the eyebrows

Answer 14

frontal bell of occupitofrontalis

Question 15

muscle that allows us to tense the skin of the neck

Answer 15

platysma

Question 16

smiling involves the muscles of both the ____ and the ______

Answer 16

mouth and eyes

Question 17

these 6 muscles move the eye

Answer 17

superior oblique
superior rectus 
lateral rectus
inferior oblique 
inferior rectus
medial rectus

Question 18

where do the 6 muscles of the eye originate from?

Answer 18

a common tendinous ring in the posterior orbit and attach onto the outer surface of the eye

Question 19

one of the major groups of muscles that moves the vertebral column by maintaining posture, bilateral contraction extends spinal column and unilateral contraction flexes the column laterally

Answer 19

erector spinae

Question 20

one of the major groups of muscles that moves the vertebral column by connecting and stabilizing the vertebrae

Answer 20

transversospinalis

Question 21

what are the 3 long muscles on both sides of the vertebral column that make up the erector spinae

Answer 21

1. spinlais = above transverse processes
2. longissimus = above and lateral to transverse processes
3. iliocostalis = thin sheet arises on ilium and inserts on ribs

Question 22

these 2 muscle groups are important flexors and extensors of the neck

Answer 22

scalenes and splenius

Question 23

these muscles are between the transverse and spinous processes of vertebrae and are important in stabilizing vertebrae

Answer 23

transversospinalis muscles

Question 24

where do the testes develop?

Answer 24

• abdominal cavity and pass thru the inguinal canal

Question 25

these muscles aid in breathing

Answer 25

intercostal muscles

Question 26

this structure consists of 3 layers of muscles known as the pelvic diaphragm

Answer 26

the pelvic floor

Question 27

what are the functions of the pelvic floor?

Answer 27

• support of pelvic organs
• control deification
• control urination
• reproduction
• erection/ejaculation
• childbirth

Question 28

this is a group of 4 muscles that provide a great range of motion in the shoulder

Answer 28

rotator cuff

Question 29

where do hamstrings originate from?

Answer 29

on the ischium

Question 30

what is the current and past intramuscular injection site?

Answer 30

previous = gluteus max
currently = ventrogluteal (gluteus minimus)

Question 31

this muscle helps stabilize hips and knee joints by putting tension on the iliotibial band

Answer 31

tensor fascia latae

Question 32

this muscle slides back and forth over distal part of femur and can become irritated

Answer 32

IT band

Question 33

what are shin splints?

Answer 33

• typically develop along medial edge of tibia

- can result from running (increased stress on muscle attachment site) which leads to inflammation of periosteum