Intro. to Behavioral Endocrinology, Third Edition

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Topic 7 More on Male Reproductive
Behavior This topic based to a large extent on
Chapter 5 materials in the second half of the
chapter.
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5.10 Maintenance versus restoration of sexual
behavior by testosterone therapy
What do you think could explain the difference in
ejaculation rates?
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5.13 Regions that are essential to the control
of sexual performance in male rats
POA lesions abolish male sexual behavior and
regulates neuroendocrine function in the brain.
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5.14 The vomeronasal organ (VNO)
The vomeronasal organ (VNO) is absent in most
primates, but essential in rodent reproductive
behavior. because it is used by the male in his
investigatory behavior to assess if the female is
ready in the right part of her ovulatory phase.
The males investigation will lead to both liquid
and gaesous chemicals being taken in. Typically
gaseous chemicals will enter the nasal cavity and
stimulate the VMO, whereas liquid chemicals that
are brought into the oral cavity by the tongue
will pass through the nasopalatine duct to
stimulate the VMO.
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5.15 The amygdala
The amygdala is the brain region that is a pair
of almond-shaped groups of nuclei located deep
within the medial temporal lobes of the brain.
It is the site for routing of many aspects of
behavior including memory emotions in
humans. In rats, the olfactory bulbs feed into
the amygdala, and hence there is a shaping of the
signals by this region.
In rat studies, two amydaloid regions are
identified Basolateral not involved in rodent
sex behavior Corticomedial involved in rodent
sex behavior
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5.16 Neural pathways in the rat olfactory system
The olfactory amygdala is therefore distinct from
the vomeronasal amygdala.
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5.17 Castration reduces neural responsiveness in
the MPOA
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5.18 The distribution of sex steroid receptors
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5.19 Brain regions in rodents that show fos
activation after sexual stimulation
fos one of the IEGS (intermediate early genes
responsible for developing sex behavior.
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5.20 Schematic depiction of neural activity in
circuits underlying male sexual behavior
Difficult to learn just by talking about it,
please exam in detail this figure in the text.
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5.21 Extracellular dopamine in the MPOA is
elevated by cues from the female
Dopamine can be supplied as a medication that
acts on the sympathetic nervous system.
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5.22 Copulatory sequence of rats mating in groups
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5.23 LH secretion can be modified by classical
conditioning
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5.24 Individual differences in sex drive
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5.25 Clinically low testosterone concentrations
can restore mating behavior
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5.29 The frequency of male sexual behavior
changes with age
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5.30 Plasma testosterone concentrations in human
males
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5.31 Individual variation in weekly frequency of
sexual outlet in men
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5.32 Effects of testosterone treatment on
hypogonadal men (Part 1)
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5.32 Effects of testosterone treatment on
hypogonadal men (Part 2)
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5.41 Hormones mediate pseudocopulation in
parthenogenetic whiptail lizards
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Box 5.1 Battles of the Sexes
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Box 5.2(A) Anatomy of the Penis (Part 1)
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Box 5.2(B) Anatomy of the Penis (Part 2)
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Box 5.3(A) Erectile Dysfunction, Nitric Oxide,
and Viagra (Part 1)
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Box 5.3(B) Erectile Dysfunction, Nitric Oxide,
and Viagra (Part 2)
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