Muscles in the Shoulder, Chest, Arm, Stomach, and Back
Shoulder Muscles
Trapezius Traps
Deltoid Delts
Trapezius (Traps) Function: Raises
head and shoulders
Origin: back of the neck and upper vertebrate
Insertion: clavicle and scapula
Deltoid (Delts) Function: Raises
the upper arm
Origin: the spine of the scapula and the clavicle
Insertion: the top of the humerus
Back
Teres Major Latissimus Dorsi
Lats Erector Spinae Rhomboids
Teres Major Function:
rotation of the humerus
Origin: scapula
Insertion: humerus
Latissimus Dorsi (Lats) Function: moves
the arm backward
Origin: lumbar vertebrae
Insertion: humerus
Erector Spinae Function:
straightens the back
Origin: lower thoracic vertebrae and top of pelvis
Insertion: back of ribs and upper thoracic vertebrae
Rhomboids Function: (deep
muscle) extends the scapula (under the teres
major)
Origin: thoracic vertebrae
Insertion: front of scapula
Chest Muscles
Pectoralis Major Pecs
Serratus Anterior
Pectoralis Major (Pecs) Function: Moves
the arm across the chest
Origin: sternum and clavicle
Insertion: medial and lateral top of the humerus
Serratus Anterior Function: Moves
the scapula forward
Origin: upper ribs / side of the ribs
Insertion: scapula
Quiz
1. Name one of the two parts of muscle.2. The place where a muscle is anchored is
called what? 3. The temporalis and the masseter work
together to perform what function? 4. Name two of the six muscles of the
shoulder and back.5. What muscle group works in a pair with
your Lats (Latissimus Dorsi)?
Quiz/Review1. Name one of the two parts of muscle.
Tendon, Belly2. The place where a muscle is anchored is called what?
Origin3. The temporalis and the masseter work together to
perform what function? Move the lower jaw
4. Name two of the six muscles of the shoulder and back.
Traps, Delts, Teres Major, Lats, Erector Spinae,Rhomboids
5. What muscle group works in a pair with your Lats (Latissimus Dorsi)?
Pecs (Pectoralis Major)
Arm Muscles
Biceps Triceps Brachioradialis Flexor Carpi Extensor Carpi
Biceps Function: flexes
arm (anterior)
Origin: side of the scapula
Insertion: radius/ulna
Triceps Function:
extends/straightens arm (posterior)
Origin: side of the scapula and the humerus
Insertion: upper ulna
Brachioradialis Function: flexes the
elbow
Origin: lateral epicondyle of humerus
Insertion: radius
Flexor Carpi Function: Closes the
hand and fingers and flexes the wrist (anterior)
Origin: medial epicondyle of humerus
Insertion: metacarpals
Extensor Carpi Function: Opens the
hand and fingers and extends the wrist (posterior)
Origin: lateral epicondyle of humerus
Insertion: metacarpals
Stomach & Abdomen
Rectus Abdominis Abs
External Obliques
Internal Obliques
Rectus Abdominis Function: flexes
trunk of the body & pulls ribs to pelvis
Important for posture
Origin: front of pelvis
Insertion: front of ribs
Obliques External Oblique:
flexes the trunk of the body and twists torso
Origin: lower ribs
Insertion: top of pelvis
Internal Oblique: Same as external, except a deeper set of muscles