The Muscular System
Which muscle type is both striated and voluntary?
Skeletal muscle
This muscles action is to compress the cheeks
Buccinator
This muscle elevates the scapula
Levator scapulae
Where is your nuchal region?
Back of the neck
What is the special structure in cardiac muscles that help them to contract at the same time?
Intercalated discs
This term describes a muscle tissues ability to continue to contract over a range of resting lengths
Extensibility
This muscle closes the eye
Orbicularis oris
What is the synergist to the triceps brachii?
Aconeus
Which vertebrae's spinous process can be palpated at the back of the neck?
C7 prominens
This muscle assists the prime mover (or agonist) in completing its action
Synergist
What happens to the A band during contraction? I band? H band? Z discs? Zone of overlap?
A bands stay the same
H and I bands get shorter
Z discs get closer
Zone of overlap becomes larger
This muscle elevates the mandible and closes the jaw
Masseter
These muscles make up the hamstrings
Biceps femoris, semimembranosus, semitendinosus
What separates the anterior cervical triangle and posterior cervical triangles?
Sternocleidomastoid
This is the deepest abdominal muscle
Transverse abdominus
What are the 3 layers of a muscle and what do each of those layers withhold?
Epimysium - whole muscle
Perimysium - fascicles
Endomysium - muscle cell/fiber
This muscles action is to depress the hyoid bone and larynx
Omohyoid
These muscles make up the quads
Rectus femoris and the vastus medialis, lateralis, and intermedius muscles
What structures make up the 3 border of the posterior cervical triangle?
Sternocleidomastoid (anterior), trapezius (posterior), and clavicle (inferior)
These muscles make up the rotator cuff (at your shoulder)
Supraspinatus, infraspinatis, subscapularis, and teres minor
Draw out a sarcomere and label the bands
(refer to picture of drawing from last class)
List the errector spinae group (I Like Spaghetti) from lateral to medial
Illiacus/illiocostalis, longissimus, and spinalis
List the 3 muscles that plantar flex the foot
Gastrocnemius, soleus, and plantaris
List the 4 areas of the anterior triangle from superior to inferior and what structure is located in each
Suprahyoid (palpate lymph nodes)
Submandibular (hyoid bone)
Superior carotid (palpate carotid pulse)
Inferior carotid (jugular notch)
What makes up the femoral triangle?
Inguinal ligament (superior), sartorius (lateral), and adductor longus (medial)