Portage Learning: A&P 1 Module 5
Brachialis (Insertion)
Tuberosity of ulna
Name the three types of muscle tissue found in the body:
Cardiac, skeletal and smooth
What does it mean that skeletal muscles are under conscious control?
A person can consciously decide to use these muscles to complet...
Name the three types of muscle tissue found in the body:
Cardiac, skeletal and smooth
What does it mean that skeletal muscles are under conscious control?
A person can consciously decide to use these muscles to complete an action.
What is included in the central nervous system?
Brain and spinal cord
Describe a motor action vs. sensory input in terms of the nervous system.
Messages from the central nervous system to a muscle are called a motor actions. Nerves also carry
information from the external environment to the central nervous system, called sensation or sensory
input.
True or false: The brachial plexus supplies nerves to the lower extremities.
False
Describe the difference between tendons and ligaments.
Tendons are connective tissues that connect skeletal muscle to bone at each end. Ligaments are
connective tissue that connects bone to bone, helping to stabilize joints where bones meet.
Describe the origin and insertion of attachment to bones.
The origin is the bony site of attachment which is stationary during the movement. The insertion of a
muscle is the bony site of attachment that is moved by the muscle contraction.
Describe muscle action and innervation.
The action of the muscle is what effect is produced by the muscle's contraction. The innervation is the
peripheral nerve that supplies a muscle with the message from the brain.
Orbicularis oculi (Action)
eye closure
Orbicularis oculi (Innervation)
facial nerve (CN VII)
Buccinator (Action)
compresses cheek
,Buccinator (innervation)
facial nerve (CN VII)
Temporalis (Action)
Elevates mandible, closes jaw
Temporalis (Innervation)
Trigeminal nerve (CN V, mandibular branch)
Sternocleidomastoid (Origin)
Sternal end of clavicle and manubrium
Sternocleidomastoid (Insertion)
Mastoid region of skull
Sternocleidomastoid (Action)
Bilateral: Neck flexion
Unilateral: Turns face to opposite side
Sternocleidomastoid (Innervation)
Accessory nerve (CN XI)
Longissimus thoracis (Origin)
Transverse process of inferior thoracic, superior lumbar vertebrae
Longissimus thoracis (Insertion)
Transverse process of middle and superior cervical vertebrae
Longissimus thoracis (Action)
Bilateral extend head
Unilateral laterally flexes neck to same side
Longissimus thoracis (Innervation)
thoracic and lumbar spinal nerves
Spinalis (Action)
extensor of the vertebral column
Rectus abdominis (Origin)
Pubic Crest, pubic symphysis
Rectus abdominis (Insertion)
, Pubis, cartilages of ribs 5-7, xiphoid process
Rectus abdominis (Action)
Flexion of spine, compression of abdominal viscera
Rectus abdominis (Innervation)
Spinal nerves (T 7-T 12)
Transverse abdominis (Origin)
Lateral inguinal ligament, inner iliac crest
Transverse abdominis (Insertion)
Linea alba, pubis
Transverse abdominis (Action)
Compression of abdomen
Transverse abdominis (Innervation)
First lumbar nerve (T 7- L1), iliohypogastric (T12-L1), ilioinguinal (T12-L1)
Diaphragm (Origin)
Cartilage of ribs 7-12, xiphoid process, lumbar vertebrae
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