Chapter 9: Intro to Muscles
Muscles of the Head and Neck
Muscles of the Core
Muscles of the Shoulder Girdle And Arm
Muscles of the Thigh and Leg
Chapter 12: Surface Anatomy
Surprise Me!
100
What is a group/bundle of muscle fibers called?
Fascicle
100
This muscle flexes and laterally rotates the neck
Sternocleidomastoid
100
This muscle flexes and rotates the vertebral column. It is divided by fibrous tissue that makes up our 'six pack'
Rectus abdominis
100
These 3 muscles are synergists with biceps brachii for elbow flexion.
Brachialis, brachioradialis and pronator teres
100
These two muscles make up triceps surae, or the posterior leg muscles
Gastrocnemius and soleus
100
Band of connective tissue that runs down the middle of rectus abdominis. Serves as an attachment point
Linea alba
100
Action is to tense the skin of your neck, 'shaving' muscle
Platysma
200
What is the main muscle of a specific action referred to as?
Prime mover/Agonist
200
This muscles originates at galea aponeurotica and it's action is to pull the scalp posteriorly and raise the eyebrows
Frontalis
200
These muscles originate and insert on the ribs and help with breathing
External and internal intercostals
200
This muscles retracts, protracts, elevates, depresses and rotates the scapula. It has high, middle and low fibers.
Trapezius
200
What muscle group flexes the thigh and extends the knee, and what muscle group extends the thigh and flexes the knee?
Flex thigh/extend knee: Quadriceps muscles
Extend thigh/flex knee: Hamstrings
200
This muscle separates teres major and minor (be specific!)
Long head of triceps brachii
200
The DEEP muscle of the hamstrings
Semimembranosus
300
Why do type I (slow) fibers appear red?
Abundant amounts of myoglobin
300
These are our smiling muscles (2)
Zygomaticus major and minor, and Risorius
300
Name the three muscles of erector spinae (any order)
Iliocostalis, Longissimus, Spinalis. Remember:
I
Like
Spaghetti!!!)
300
Origin: 3rd to 5th ribs near their costal cartilages. Insertion: Medial border and superior surface of coracoid process of scapula Action: This muscle depresses, stabilizes, ABducts the scapula. Deep to the pectoralis major.
Pectoralis Minor
300
What muscle does dorsiflexion? What muscle is the prime mover of plantar flexion?
Dorsiflexion: Anterior tibialis
Plantar Flexion: Gastrocnemius
300
What muscle is found on the axilla?
Teres major
300
These two muscles originate and insert on the forearm, and their action is to pronate the forearm
Pronator Teres and Pronator Quadratus
400
What happens to the sarcomere during a muscle contraction?
1. H & I bands move closer together 2. Z-lines move closer together 3. Zone of Overlap increases 4. A bands stay the same
400
Which of these is NOT a muscle of mastication?
a. Temporalis
b. Masseter
c. Buccinator
d. Mentalis
d. Mentalis
400
The DEEPEST muscle of the abdomen, it's action is to compress abdominal contents
Transverse abdominis
400
This fan shaped muscle's action is to protract and do upward rotation of the scapula. It also is called the boxer's muscle.
Serratus Anterior
400
Name the hip adductors (5!)
Adductor magnus, Adductor brevis, Adductor longus, Gracilis, and Pectineus
400
What makes up your femoral triangle?
Sartorius, adductor longus, and inguinal ligament
400
This muscle ABducts the thumb
ABductor pollicis longus
500
What three neuro components need to be present in a muscle cell for a contraction to occur?
ACh (Actylcholine), Ca2+ (calcium ions) and ATP
500
Origin - Posterior surface of manubrium of sternum Insertion - Thyroid cartilage Action - Pulls larynx and hyoid bone inferiorly
Sternothyroid
500
Deepest muscle of the back. It extends the vertebral column, lateral flexion of the vertebral column, and helps with inspiration
Quadratus Lumborum
500
Name the SHOULDER FLEXORS, and the SHOULDER EXTENSORS. Hint: There are three for each!
Flexors: Pectoralis major (prime mover), Anterior deltoid and Coracobrachialis
Extensors: Latissimus Dorsii (prime mover), Posterior Deltoid, and Teres Major
500
Name the LATERAL rotators of the thigh (think deep muscles!)
Piriformis, Obturator externus and internus, gemellus superior and inferior, and quadratus femoris
Remember: PGOGOQ!
500
What regions make up your anterior cervical triangle?
Suprahyoid triangle, submandibular triangle, superior carotid triangle, and inferior carotid triangle
500
Prime movers of THIGH FLEXION (not the quads!)
Iliopsoas (iliacus, psoas major)