Laboratory Exercise IX

Prior to lab, I suggest that you make a photocopy of figure 34.1.  Keep it available as you dissect the muscular system.

NOTE: We organize muscles into groups based on homologies and common development.  However, all of these muscles are, of course, mixed across the surface of the skeletal system of the cat.

Muscles are presented in the order in which they are encountered in the book.  I have also added notations to assist with organization.  The organization reflects that of the homologies page.  These designations are as follows:

Felis  catus

cutaneous maximus  (AP)

platysma  (BII)

Superficial thoracic muscles:

                pectoantebrachialis (FLFl)

                pectoralis major (FLFl)

                pectoralis minor (FLFl)

                xiphihumeralis (FLFl)

Abdominal muscles:

                external oblique (HA)

                internal oblique (HA)

                transversus abdominis (HA)

                rectus abdominis (HA)

Deep thoracic muscles:

                serratus ventralis (HA)

scalenes (HA)

intercostalis externus (HA)

intercostalis internus (HA)

transversus thoracis (HA)

                serratus dorsalis (HA)

Superficial back muscles:

                clavotrapezius (BIII+)

                clavobrachialis (FLEx)

                acromiotrapezius (BIII+)

                spinotrapezius (BIII+)

                latissimus dorsi (FLEx)

Lower back muscles: lumbar and thoracic

                multifidus spinae (EA)

longissimus dorsi (EA)

spinalis dorsi (EA)

                iliocostalis (EA)

Muscles of the neck:

                sternomastoid (BIII+)

cleidomastoid (BIII+)

sternohyoid (PoH)

sternothyroid (PoH)

                thyrohyoid (PoH)

mylohyoid (BI)

geniohyoid (PrH)

genioglossus (PrH)

hyoglossus (PrH)

styloglossus (PrH)

Deep neck and back muscles:

                rhomboideus capitis (HA)

rhomboideus cervicis and throacis (HA)

splenius (EA)

longissimus capitis (EA)

Muscles of the head:

                masseter (BI)

                temporalis (BI)

                digastric (BI + BII)

Muscles of the shoulder:

supraspinatus (FLFl)

                infraspinatus (FLFl)

                teres major (FLEx)

                levator scapulae ventralis (HA)

acromiodeltoid (FLEx)

spinodeltoid (FLEx)

subscapularis (FlFl)

Muscles of the upper forelimb or brachium:

                coracobrachialis (FLFl)

                epitrochlearis (FLEx)

                biceps brachii (FLFl)

                triceps brachii (3 parts) (FLEx)

                anconeus (FLEx)

                brachialis (FLFl)

Muscles of the lower forelimb or antebrachium: omit

Muscles of the manus: omit

Muscles of the thigh:

                sartorius (HLFl)

                gracilis (HLFl)

biceps femoris (HLEx)

                caudofemoralis (HLEx)

semitendinosus (HLEx)

semimembranosus (HLFl)

adductor femoris (HLFl)

tensor fascia latae (HLEx)

vastus medialis (HLFl)

rectus femoris (HLFl)

vastus lateralis (HLEx)

Muscles of the shank: omit

Muscles of the pes: omit

Muscles of the hip:

gluteus maximus (HLEx)

gluteus medius (HLEx)

Tail muscles: omit