Please do not write in these spaces

BIOLOGY 2325 – HUMAN ANATOMY

THIRD MIDTERM EXAMINATIONAUTUMN SEMESTER 2017

Name __________________________________________________________________ Last First (Please print clearly)

DIRECTIONS: Read each question carefully before answering. Understanding the questions is a part of the examination. Answer all questions in the spaces provided on the examination. Print your name in the space provided on the first page and at the top of each subsequent page. This examination consists of 6 questions and 7 pages. It is your responsibility to see that the examination is complete. DO NOT WRITE IN RED. Please write in a legible fashion. If we cannot read your answer, it will be marked wrong.

1. (9 points) Answer each of the following in the space provided:

List all the muscles that attach to the region of the lateral epicondyle of the humerus.

List all the muscles that produce a movement of any of the joints of the thumb.

What is the common action shared by the following muscles of the ring finger: extensor digitorum, lumbrical, palmar interossei, and dorsal interossei. You must state an action and the joint(s) moved.

1 2 3 4 5 6 Score

75Possible Points

Name _____________________________________

2

2. (20 points) Fill in the table below for the different regions of the pelvis and color-code each region on both illustrations.

Color Pelvic Region Contents in Male Contents in Female

Pelvic cavity(name 5 structures in male pelvic cavity and 5 structures in female pelvic cavity)

Ischioanal fossa(name 3 structures that occur in both the male and female ischioanal fossa)

Deep perineal pouch(name 4 structures in male deep perineal pouch and 5 structures in female deep perineal pouch)

Superficial perineal pouch(name 5 structures in the male superficial perineal pouch and 5 structures in female superficial perineal pouch)

Female Male

Name _____________________________________

3

3. (7 points) On the line below each of the illustrations that follow, label the muscle that is isolated and illus-trated on the left side of the illustration.

Name _____________________________________

4

4. (24 points) Fill in the table below for the each muscle listed. Color-code each muscle on the illustrations on the next page with the color you indicate in the table. You must color each muscle completely in both views.Color Muscle Origin (must be complete to get credit) Insertion (must be complete to get credit) Name one action it can produce at a joint

Rhomboideus major

Pectoralis major

Levator scapulae

Trapezius

Serratus anterior

Teres major

Latissimus dorsi

Deltoid

Brachialis

Teres minor

Biceps brachii

Triceps brachii

Name _____________________________________

5

Name _____________________________________

6

5. (5 points) Circle the letter next to the correct answer for each question below. You must clearly circle the correct letter. If you circle more than one letter or you are sloppy and we cannot tell which letter is being circled your answer will be marked wrong.

This nerve supplies the muscles of the perineum and the skin of the penis and clitoris in the male and female. What is this nerve called? A. obturator B. pudendal C. parasympathetic splanchnic D. sympathetic splanchnic

From which plexus does the pudendal nerve arise? A. brachial B. cervical C. lumbar D. sacral

The laminae and pedicles of a vertebra develop from the A. vertebral arch. B. costal element. C. vertebral body. D. myotome.

Which of the following landmarks form the pelvic inlet? A. pubic crest, pectineal line, arcuate line, sacral promontory B. pubic crest, pectineal line, arcuate line, iliac crest C. inferior pubic ramus, ischial ramus, ischial tuberosity, coccyx D. pubic crest, iliac crest, sacral body, iliac body A transverse line drawn between the ischial tuberosities divides the perineum into A. a deep perineal pouch and a superficial perineal pouch. B. an ischioanal fossa and the pelvic cavity. C. the pelvic inlet and pelvic outlet. D. an anterior urogenital triangle and a posterior anal triangle.

The splenius, erector spinae, semispinalis, and multifidus muscles are innervated by the A. intercostal nerves. B. ventral rami of the spinal nerves. C. splanchnic nerves. D. dorsal rami of the spinal nerves.

The pelvic floor, or pelvic diaphragm, is comprised of the A. levator ani and deep transverse perinei muscles. B. levator ani and ischiococcygeus muscles. C. levator ani and the superficial transverse perinei muscles. D. levator ani and the deep external anal sphincter muscles.

The most superficial epaxial muscles are the A. spinalis capitis and spinalis cervicis B. longissimus capitis and longissimus cervicis C. splenius capitis and splenius cervicis D. semispinalis capitis and semispinalis cervicis

The principal artery of the pelvis that branches to supply both the somatic structures of the pelvis as well as the visceral structures of the pelvis is the

A. external iliac artery. B. lumbar artery. C. femoral artery. D. internal iliac artery.

The bones of the limbs develop from the __________ and the muscles of the limbs develop from the ___________. A. somite, epimere B. lateral mesoderm, hypomere C. sclerotome, hypomere D. lateral mesoderm, dermatome

Name _____________________________________

7

6. (10 points) Answer each of the questions pertaining to the innervation of the upper limb in the associated spaces below:

If the latissimus dorsi, and only the latissimus dorsi, was no longer able to contract, which nerve would be cut? ________________________________________________________________________________

Which nerve(s) would completely lose their function if the proximal most end of the superior trunk was cut? _________________________________________________________________________________

If the first and second lumbricals, the opponens pollicis, the flexor pollicis brevis, and the abductor pollicis brevis muscles are paralyzed, and no additional muscles are affected, state which nerve is damaged and the precise location of the damage.

Damage nerve _______________________________________________________

Location of damage ___________________________________________________

Which nerve(s) would completely lose their function if the distal most end of the medial cord was cut? _____________________________________________________________________________________

If the dorsal scapular nerve was cut near the point where it arises from the C5 root of the brachial plexus, which muscles would no longer function? ___________________________________________________

A patient comes into your office with complete paralysis of the flexor carpi ulnaris, ulnar side of the flexor digitorum profundus, adductor pollicis, palmaris brevis, flexor digiti minimi brevis, abductor digiti minimi, opponens digiti minimi, third and fourth lumbricals, palmar interossei, dorsal interossei muscles, and with a complete loss of cutaneous sensation on the medial side of the brachium and antebrachium. You note no problem in the strength of the pectoral muscles. Describe which one nerve has been damaged and where the damage would be to lead to these specific problems. Would you expect any additional problems? Clearly explain.

Nerve damaged _____________________________________________________________________

Where is the damage on the nerve (be precise) ____________________________________________

Clearly explain any additional problems __________________________________________________

An aneurysm of the posterior circumflex humeral artery completely compresses the axillary nerve as they both pass through the __________________ in their pathway from the axilla to the pos-terior shoulder region. Which muscles would be paralyzed as a result of this nerve compression? __________________________

If the musculocutaneous nerve is cut at its proximal end, explain why you are still able to flex the elbow joint. ______________________________________________________________________________

The radial nerve is the largest branch of the ______________________ and it innervates _______ muscles.