Characteristics
What does type of muscle has intercalated discs?
Cardiac muscle
Define homeostasis.
Stable internal conditions
O. Inferior pubis
I. Medial proximal end of tibia
A. Flexion
Gracilis
O. Medial portions of the maxilla and mandible
I. Skin and fascia around lips and mouth
A. Closes the mouth and purses lips
Orbicularis oris
O. Lateral, posterior part of humerus
I. Olecranon process of ulna
A. Extension
Triceps brachii (lateral head)
What are voluntary muscles?
Voluntary muscles are muscles under your control.
What is the difference between abduction and adduction?
Abduction - Move away from midline
Adduction - Move toward midline
O. Medial 1/2 of clavicle, most of sternum, and cartilages of ribs 1-7
I. On humerus, just lateral of bicipital groove
O. Adduction and medial rotation
Pectoralis major
O. Zygomatic arch
I. Ramus of mandible
A. Elevation of mandible
Masseter
O. Medial epicondyle of femur and lateral epicondyle of femur
I. Calcaneus via the Achilles tendon
A. Plantar flexion
Gastrocnemius
What are involuntary muscles?
Involuntary muscles are muscles you can't control.
What is the difference between Depression and Elevation?
Depression - inferior movement
Elevation - superior movement
O. Distal, lateral portion of humerus
I. Styloid process of the radius
A. Flexion
Brachioradialis
O. Lower borders of ribs 1-11
I. Upper borders of ribs 2-12
A. Compresses chest, depresses rib cage
Internal intercostals
I. Tibial tuberosity
A. Extension, flexes thigh when knee is held fixed
Rectus femoris
What are the 3 types of muscles?
smooth, cardiac, and skeletal.
What is the difference between Eversion and Inversion?
Eversion - Twist sole outward
Inversion - Twist sole inward
O. Posterior distal portion of humerus
I. Olecranon process of ulna
A. Extension
Triceps brachii (medial head)
O. Lower borders of ribs 1-11
I. Upper borders of ribs 2-12
A. Expands chest, elevates rib cage
O. Anterior superior iliac spine
I. Medial proximal end of tibia
A. Flexion
Sartorius
What are the characteristics of smooth muscle?
What is the difference between Opposition and Reposition?
Opposition - Move thumb toward palm
Reposition - Move thumb away from palm
O. Medial epicondyle of humerus
I. Midway on the lateral surface of radius
A. Pronation
Pronator teres
O. Manubrium and medial end of clavicle
I. Mastoid process of the temporal bone
A. Rotates head singly and pulls the head forward and elevates chin synergistically
Sternocleidomastoid
O. Acromion process, lateral part of clavicle
I. Deltoid tuberosity of humerus
A. Abduction, lateral rotation, and medial rotation
Deltoid
What are the characteristics of cardiac muscles?
What is the difference between Pronation and Supination?
Pronation - Move from palm facing front to palm facing back
Supination - Move from palm facing back to palm facing front
O. Posterior ilium
I. Greater trochanter of femur
A. Abduction
Gluteus medius
O. Maxilla and mandible (lateral portions)
I. Among fivers of orbicularis oris
A. Tightens cheeks, keeps food between teeth
Buccinator
I. Linea aspera on femur
A. Adduction
Adductor longus
How are skeletal muscles unique to the other types of muscle?
They have many nuclei.
Name 3 ways your muscles maintain homeostasis.
movement, body position, support tissues, guard entrances and exits, maintain body temperature
O. Supraspinous fossa
I. Head of humerus
A. Abduction
Supraspinatus
O. Frontal, maxillary, and lacrimal bones
I. Skin around eye and lids
A. Closes eyelids
Orbicularis oculi
O. Linea aspera
I. Head of fibula and lateral condyle of tibia
A. Flexion
Biceps femoris (short head)