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  Marty Muscle and his family went on their first 

Cruise this summer. They did lots of physical activity 

while on vacation and used muscles in different parts 

of the body! He had a lot of fun, but also experienced 

a few small injuries. Through all of it he learned 

some new information about muscles throughout his 

body. 

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Non-chewing Facial Muscle

My family bought plane tickets to Florida in order to board the cruise ship. Little 

did we know until we were sitting in the airport that an incoming storm would 

delay our flight. This upset me and caused me to flare my nostrils, expressing my 

anger. Since I had plenty of time to waste until the next flight, I got out my smart-

phone and searched to find the muscle I used to flare my nostrils. The   Musculus 

Nasalis is a muscle found in your nose that allows you to do this. The origin is on 

the maxilla (two bones that form the upper jaw). I found out that the insertion of 

the Nasalis is on the nasal bone. I learned the name of this muscle comes from 

the Latin word "nassus", meaning nose. I discovered that the nerve supply for this 

muscle is the facial nerve. Muscle fibers in this muscle work together to open and 

close the nostrils: for example, to flare the nostrils. This muscle is a prime mover.

http://www.anatomyexpert.com/

structure_detail/5022/1548/

Front Trunk Muscle

While I was trying to impress the ladies by doing handstands on the beach, my shoulder started 

to hurt. I know what causes you to be able to raise your arm (to answer questions in class) plus 

flex and extend it. It is your Deltoid (Deltoideus) Muscle; the muscle around the shoulder. I went 

online to find out even more about this muscle. I learned the muscle received its name from the 

Greek letter delta because it looks like a triangle. The Deltoid passes up and over the shoulder 

joint and is attached to the scapula, clavicle, and half way down the humerus. That is where my 

body was hurting! The website said he origin is at the anterior surface of the lateral clavicle, and 

the insertion is the deltoid elevation of the humerus. This is a fixator muscle. Now I can impress 

the ladies with my new knowledge instead!

www.getbodysmart.com

www.innerbody.com

Back Trunk Muscle

After eating all the delicious foods on the ship, I wanted to make sure that I was staying in 

shape and keeping my muscles super toned! I woke up early each morning and went to 

the pool on the top deck to swim the freestyle stroke for a half hour. Muscles that helped 

me to do this are the Latissimus dorsi. An informational pamphlet on back pain taught 

me that this is a triangular muscle found in my shoulder and the back. It explained the 

meaning of the name comes from the Latin root word "lattus", meaning wide or broad. The 

Latissimus dorsi originates at the lower back and the top of the hip. I learned that the 

insertion of this muscle is into the proximal end of the humerus (armpit area). The nerve 

supply for the muscle is from the Thoracodorsal nerve. I found out the Latissimus dorsi is 

responsible for rotation, extension behind the back, and the adduction of the arm (lifting it). 

This muscle is a synergist muscle.

http://www.anatomyexpert.com/structure_detail/5518/22219/

Antagonist Leg Muscle

To stand, walk, run, or jump, you need 2 very important muscles. On vacation I was doing 

these activities a lot to stay in shape, but still enjoying my vacation. One muscle needed to 

do these activities is the Gastrocemius; a superficial muscle that is in the back part of the 

lower leg. This runs from 2 heads above the knee to the heel. This muscle is called the 

stomach of the leg. Weird but "Gastro" which means stomach and "cemius" means shin and 

somehow translates into stomach of the leg. One time I got a spasm in my Gastrocemius 

from not stretching before my intense exercise. It hurt really bad! The function of this 

muscle is plantar flexing the foot at ankle joint and flexing the leg at the knee joint. The 

origin is superior to articular surfaces of lateral and medial femur and the insertion is Achilles 

Tendon into mid-posterior Calcaneous. This is an antagonist muscle. When I got the spasm, 

I got scared and went to my dad and he told me about these muscles.

www.exrx.net/Muscles/Gastrocemius.html

Antagonist Leg Muscle 

The other muscle you need for these activities is the Tibialis muscle. This muscle is in the 

upper two-thirds of the lateral surface of the tibia. Tibialis gets its name from its location 

which is by the Tibia. The origin of this muscle is the body of the tibia and the insertion is 

the medial cuneiform and first metatarsal bones of the foot. I learned the nerve supply is 

from the Deep peroneal nerve. This is an antagonist mover just like the Gastrocemius, and 

you can flex it just like the Gastrocemius. Now i know to stretch these muscles before 

doing intense activity. I am so glad I searched this muscle pair on the internet so I know 

how important it is to stretch!

www.exrx.net/Muscles/Gastrocemius.html

en.wikipedia.org/wiki/Tibialis_anterior_muscle

Antagonist Arm Muscle

My huge suitcase had to be moved from the middle of our room and into to 

the closet. To move the suitcase, I was forced to use my Biceps Brachii. 

My dad seemed to know a lot about this muscle pair so I had him teach me 

what he knew. I learned that these are the muscles located on the upper arm 

between the elbow and the shoulder that allow you to lift things. The name 

comes from the Latin word for two, "bi" and the Greek "brachion", meaning 

arm. Dad said the origin of this muscle is at the top of the scapula (shoulder 

blade) while the insertion is at the deltoid (muscle around the rounded part of 

the shoulder). The nerve supply is from the Musculocutaneous nerve and 

this is a prime mover (for flexion in the forearm). 

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